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 A245454 #8 Jul 22 2014 16:02:06 %S A245454 1,2,4,3,6,5,18,8,9,25,11,16,64,14,27,12,96,7,288,21,20,243,891,45,10, %T A245454 405,15,162,33750,30,78650,75,625,2025,35,81,390390,224,875,250,41, %U A245454 375,16384,270,24,300125,24576,150,125,54,6125,1350,73728,50,108,350,594,140777,5845851,98,221433750,1446445,343,13 %N A245454 Self-inverse permutation of nonnegative integers, A075158-conjugate of blue code: a(n) = 1 + A075157(A193231(A075158(n-1))). %H A245454 Antti Karttunen, <a href="/A245454/b245454.txt">Table of n, a(n) for n = 1..512</a> %H A245454 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %F A245454 a(n) = 1 + A075157(A193231(A075158(n-1))). %o A245454 (Scheme) (define (A245454 n) (+ 1 (A075157 (A193231 (A075158 (- n 1)))))) %Y A245454 Cf. A193231, A075157, A075158, A234747, A234748. %Y A245454 Similar permutations: A245451, A245452, A122111, A241909, A241916. %K A245454 nonn %O A245454 1,2 %A A245454 _Antti Karttunen_, Jul 22 2014