The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A055949

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Showing entries 1-10 | older changes

A055949

n - reversal of base 4 digits of n (written in base 10).
(history; published version)

#11 by Bruno Berselli at Wed Feb 01 16:58:08 EST 2017

STATUS

proposed

approved

#10 by Michel Marcus at Wed Feb 01 13:54:51 EST 2017

STATUS

editing

proposed

#9 by Michel Marcus at Wed Feb 01 13:54:46 EST 2017

CROSSREFS

Cf. A030103, A056965.

STATUS

proposed

editing

#8 by Indranil Ghosh at Wed Feb 01 13:19:58 EST 2017

STATUS

editing

proposed

#7 by Indranil Ghosh at Wed Feb 01 13:18:54 EST 2017

COMMENTS

a(n) is a multiple of 3.

LINKS

Indranil Ghosh, <a href="/A055949/b055949.txt">Table of n, a(n) for n = 0..20000</a>

FORMULA

a(n) = n - A030103(n).

EXAMPLE

For n = 6, the reversal of base 4 digits of n (written in base 10) is 9. So, a(6) = 6 - 9 = -3. - Indranil Ghosh, Feb 01 2017

STATUS

approved

editing

#6 by Charles R Greathouse IV at Thu Nov 21 12:47:24 EST 2013

MATHEMATICA

Table[n-FromDigits[Reverse[IntegerDigits[n, 4]], 4], {n, 0, 90}] (* From _Harvey P. Dale, _, Aug 22 2011 *)

Discussion

Thu Nov 21

12:47

OEIS Server: https://oeis.org/edit/global/2062

#5 by Russ Cox at Fri Mar 30 18:51:26 EDT 2012

AUTHOR

_Henry Bottomley (se16(AT)btinternet.com), _, Jul 18 2000

Discussion

Fri Mar 30

18:51

OEIS Server: https://oeis.org/edit/global/247

#4 by Harvey P. Dale at Mon Aug 22 17:25:05 EDT 2011

STATUS

editing

approved

#3 by Harvey P. Dale at Mon Aug 22 17:25:01 EDT 2011

MATHEMATICA

Table[n-FromDigits[Reverse[IntegerDigits[n, 4]], 4], {n, 0, 90}] (* From Harvey P. Dale, Aug 22 2011 *)

STATUS

approved

editing

#2 by N. J. A. Sloane at Fri May 16 03:00:00 EDT 2003

CROSSREFS

Cf. A056965.

KEYWORD

base,sign,new

AUTHOR

Henry Bottomley (se16@(AT)btinternet.com), Jul 18 2000