The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A267540 Primes p such that p (mod 3) = p (mod 5). 3
 2, 17, 31, 47, 61, 107, 137, 151, 167, 181, 197, 211, 227, 241, 257, 271, 317, 331, 347, 421, 467, 541, 557, 571, 587, 601, 617, 631, 647, 661, 677, 691, 751, 797, 811, 827, 857, 887, 947, 977, 991, 1021, 1051, 1097, 1171, 1187, 1201, 1217, 1231, 1277, 1291 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Or primes p such that p (mod 15) = {1, 2}. Terminal digits in a(7)...a(32) alternate 26 times (7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1, 7, 1). 25 differences between the 2 consecutive terms in this range show patterns as well. A differenceroot function can generate the terms a(7)...a(32). LINKS Table of n, a(n) for n=1..51. FORMULA a(n) = 1/2*((-1)^n*(3*(-1)^n*(10n+81)-1)) with (1

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 23 14:31 EDT 2024. Contains 373651 sequences. (Running on oeis4.)