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 A167605 #2 Mar 30 2012 17:27:05 %S A167605 1,2,3,16,18,19,26,27,34,35,36,38,39,40,48,51,52,53,54,55,63,73,75,76, %T A167605 77,78,83,93,94,98,99,106,113,114,121,122,123,128,143,144,145,146,147, %U A167605 148,149,150,151,152,156,157,158,159,168,173,174 %N A167605 Positive integers n such that the first n terms of A167604 form a permutation of the first n primes. %C A167605 Is this sequence infinite? %e A167605 a(4)=16 since the first 16 terms of A167604 are 2,3,5,11,37,13,7,29,17,19,43,23,47,41,53,31 which is a permutation of the first 16 primes. %Y A167605 A167604, A000945 %K A167605 nonn %O A167605 1,2 %A A167605 Kok Seng Chua (chuakokseng(AT)hotmail.com), Nov 07 2009 %E A167605 Edited and extended by _Max Alekseyev_, Nov 11 2009