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 A171561 #7 Aug 29 2014 18:25:40 %S A171561 1,2,3,5,7,8,11,13,17,19,23,27,29,31,32,37,41,43,47,53,59,61,67,71,73, %T A171561 79,83,89,97,101,103,107,109,113,125,127,128,131,137,139,149,151,157, %U A171561 163,167,173,179,181,191,193,197,199,211,223,227,229,233,239,241,243 %N A171561 (n-th prime number)^(n-th non-single or nonisolated number) with duplicates removed. %C A171561 The definition is: numbers of the form A000040(i)^A167707(j), sorted, without repetition, any i,j>=1. [From _R. J. Mathar_, May 22 2010] %e A171561 a(1)=2^0=1, a(2)=2^1=2, a(3)=3^1=3, a(4)=5^1=5, a(5)=7^1=7, a(6)=2^3=8. %Y A171561 Cf. A000040 (the prime numbers), A167707 (the non-single or nonisolated numbers). %K A171561 nonn %O A171561 1,2 %A A171561 _Juri-Stepan Gerasimov_, Dec 11 2009, Dec 14 2009 %E A171561 Entries checked by _R. J. Mathar_, May 22 2010