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 A265338 #11 May 24 2021 00:18:03 %S A265338 0,1,8,7,6,5,4,3,2,9,10,71,62,53,44,35,26,17,72,89,80,61,52,43,34,25, %T A265338 16,63,88,79,70,51,42,33,24,15,54,87,78,69,60,41,32,23,14,45,86,77,68, %U A265338 59,50,31,22,13,36,85,76,67,58,49,40,21,12,27,84,75,66,57,48,39,30,11,18,83,74,65,56,47,38,29,20,81 %N A265338 Self-inverse permutation of nonnegative integers: a(n) = A264979(8*n) / 8. %C A265338 It appears that A264979(m x) == 0 (mod m) for m = 2^k and m = 5*2^k, k >= 0, but not for other m. Is there a simple explanation? - _M. F. Hasler_, May 21 2021 %H A265338 Antti Karttunen, <a href="/A265338/b265338.txt">Table of n, a(n) for n = 0..7381</a> %H A265338 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A265338 a(n) = A264979(8*n) / 8. %o A265338 (Scheme) (define (A265338 n) (/ (A264979 (* 8 n)) 8)) %Y A265338 Cf. A264979. %Y A265338 Cf. also A264978. %K A265338 nonn,base %O A265338 0,3 %A A265338 _Antti Karttunen_, Dec 07 2015