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 A071065 #18 Apr 16 2025 05:25:33 %S A071065 2,1,4,3,6,5,10,9,8,7,12,11,16,15,14,13,20,19,18,17,22,21,24,23,28,27, %T A071065 26,25,30,29,36,35,34,33,32,31,42,41,40,39,38,37,46,45,44,43,50,49,48, %U A071065 47,52,51,54,53,58,57,56,55,68,67,66,65,64,63,62,61,60,59,70,69,78,77 %N A071065 A permutation of natural numbers: a(1)=2 a(n) is the smallest integer different from a(1), a(2), a(3), ..., a(n-1) such that a(n)+n is prime. %C A071065 a(a(n))=n: a self-inverse permutation with A010051(a(n)+n)=1. - _Reinhard Zumkeller_, Nov 25 2004 %H A071065 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %Y A071065 Cf. A010051, A083569. %K A071065 easy,nonn %O A071065 1,1 %A A071065 _Benoit Cloitre_, May 26 2002 %E A071065 Corrected and extended by _Lior Manor_, May 27 2002