The On-Line Encyclopedia of Integer Sequences (OEIS)

Revisions by Harvey P. Dale

(See also Harvey P. Dale's wiki page
and changes approved by Harvey P. Dale)

(Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A069684

Primes with either no internal digits or all internal digits are 9.
(history; published version)

#29 by Harvey P. Dale at Sun Nov 10 17:20:55 EST 2024

STATUS

editing

approved

#28 by Harvey P. Dale at Sun Nov 10 17:20:52 EST 2024

LINKS

Harvey P. Dale, <a href="/A069684/b069684.txt">Table of n, a(n) for n = 1..252</a> (* All terms with less than 500 digits. *)

STATUS

approved

editing

#26 by Harvey P. Dale at Sun Nov 10 17:20:14 EST 2024

STATUS

editing

approved

Discussion

Sun Nov 10

17:20

OEIS Server: Installed new b-file as b069684.txt.  Old b-file is now b069684_3.txt.

#25 by Harvey P. Dale at Sun Nov 10 17:20:09 EST 2024

LINKS

Harvey P. Dale, <a href="/A069684/b069684_3.txt">Table of n, a(n) for n = 1..200252</a>

STATUS

approved

editing

#23 by Harvey P. Dale at Sun Nov 10 17:19:29 EST 2024

STATUS

editing

approved

Discussion

Sun Nov 10

17:19

OEIS Server: Installed new b-file as b069684.txt.  Old b-file is now b069684_2.txt.

#22 by Harvey P. Dale at Sun Nov 10 17:19:26 EST 2024

LINKS

Harvey P. Dale, <a href="/A069684/b069684_2.txt">Table of n, a(n) for n = 1..200</a>

STATUS

approved

editing

#21 by Harvey P. Dale at Sun Nov 10 17:01:04 EST 2024

STATUS

editing

approved

#20 by Harvey P. Dale at Sun Nov 10 17:01:02 EST 2024

MATHEMATICA

Join[Prime[Range[25]], Select[Prime[RangeFlatten[26, 6000]], UnionTable[MostFromDigits[RestJoin[IntegerDigits{d1}, PadRight[#]{}, n, 9], {d2}]]==, {n, 150}, {d1, 9}, {d2, {1, 3, 7, 9}&}]], PrimeQ]] (* Harvey P. Dale, Nov 10 2024 *)

STATUS

approved

editing

#18 by Harvey P. Dale at Sun Nov 10 17:00:02 EST 2024

STATUS

editing

approved

Discussion

Sun Nov 10

17:00

OEIS Server: Installed new b-file as b069684.txt.  Old b-file is now b069684_1.txt.

#17 by Harvey P. Dale at Sun Nov 10 16:59:49 EST 2024

LINKS

Harvey P. Dale, <a href="/A069684/b069684_1.txt">Table of n, a(n) for n = 1..81200</a> (* All terms up to and including the 5 millionth prime. *)

STATUS

approved

editing