The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A216308

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

A216308

Values of k such that 10*k+7 and 10*k+9 are the only primes between 10*k and 10*k+9.
(history; published version)

#17 by Hugo Pfoertner at Tue Jun 21 04:27:02 EDT 2022

STATUS

reviewed

approved

#16 by Michel Marcus at Tue Jun 21 02:36:11 EDT 2022

STATUS

proposed

reviewed

#15 by Jon E. Schoenfield at Tue Jun 21 00:28:09 EDT 2022

STATUS

editing

proposed

#14 by Jon E. Schoenfield at Tue Jun 21 00:28:07 EDT 2022

NAME

Values of n k such that 10*nk+7 and 10*nk+9 are the only primes between 10*n k and 10*nk+9.

STATUS

approved

editing

#13 by Charles R Greathouse IV at Fri Sep 07 01:04:17 EDT 2012

STATUS

editing

approved

#12 by Charles R Greathouse IV at Fri Sep 07 01:04:14 EDT 2012

FORMULA

a(n) >> n log^2 n. - Charles R Greathouse IV, Sep 07 2012

STATUS

approved

editing

#11 by N. J. A. Sloane at Tue Sep 04 11:29:05 EDT 2012

STATUS

editing

approved

#10 by N. J. A. Sloane at Tue Sep 04 11:29:02 EDT 2012

NAME

Values of k n such that 10*kn+7 and 10*kn+9 alone are prime the only primes between 10*k n and 10*kn+9.

STATUS

approved

editing

#9 by T. D. Noe at Tue Sep 04 00:09:36 EDT 2012

STATUS

editing

approved

#8 by T. D. Noe at Tue Sep 04 00:09:32 EDT 2012

DATA

34, 127, 202, 223, 226, 265, 352, 355, 412, 433, 454, 463, 496, 619, 694, 730, 838, 853, 859, 967, 976, 1000, 1003, 1042, 1093, 1105, 1171, 1177, 1321, 1339, 1399, 1438, 1444, 1486, 1528, 1741, 1759, 1765, 1774, 1783, 1795, 1828, 1969, 2047, 2050, 2071, 2080, 2089, 2137, 2155, 2158, 2164, 2173, 2236, 2263, 2368, 2491, 2557, 2599

STATUS

approved

editing