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 A163465 #7 Jul 16 2015 21:55:57 %S A163465 2,3,0,1,5,4,7,6,11,13,17,8,19,9,23,29,31,10,37,12,41,43,47,14,53,59, %T A163465 61,67,71,15,73,16,79,83,89,97,101,18,103,107,109,20,113,21,127,131, %U A163465 137,22,139,149,151,157,163,24,167,173,179,181,191,25,193,26,197,199,211,223 %N A163465 Permutation of the nonnegative integers moving primes to nonprime indices and nonprimes to prime indices. %C A163465 The nonnegative integers A001477 = A141468 U A000040 are reshuffled. %C A163465 The positions 0,1,2,3,.. in this sequence here are marked as prime or nonprime, and the nonnegative integers %C A163465 are filled in at positions of their opposite class. %e A163465 The positions 0,1,2,3,4,5,... are N,N,P,P,N,P... (N=nonprime, P=prime), %e A163465 and are filled by two prime, then two nonprime, one prime, one nonprime member of A001477. %Y A163465 Cf. A000040, A001477, A141468. %K A163465 nonn,easy %O A163465 0,1 %A A163465 _Juri-Stepan Gerasimov_, Jul 28 2009 %E A163465 Definition clarified, offset set to 0, values checked by _R. J. Mathar_, Aug 02 2009 %E A163465 Missing term 89 contributed by _Jaroslav Krizek_, Oct 02 2010