This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A091179 #12 Mar 08 2016 11:29:19 %S A091179 2,3,4,5,6,9,12,14,15,16,18,19,20,27,30,31,33,38,39,42,43,44,47,54,55, %T A091179 56,58,59,62,63,65,67,68,69,74,79,83,84,86,89,91,93,94,99,100,102,107, %U A091179 108,110,122,123,129,133,134,135,139,143,147,153,154,155,156,162,167 %N A091179 A088878 indexed by A000040. %H A091179 Michael De Vlieger, <a href="/A091179/b091179.txt">Table of n, a(n) for n = 1..10000</a> %F A091179 a(n)=k such that A000040(k) = A088878(n). %p A091179 select(n -> isprime(3*ithprime(n)-2), [$1..1000]); # _Robert Israel_, Mar 04 2016 %t A091179 PrimePi@ Select[Prime@ Range@ 167, PrimeQ[3 # - 2] &] (* _Michael De Vlieger_, Mar 04 2016 *) %Y A091179 Cf. A088878, A091180, A091181. %K A091179 easy,nonn %O A091179 1,1 %A A091179 _Ray Chandler_, Dec 27 2003 %E A091179 Offset corrected by _Michael De Vlieger_, Mar 04 2016