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 A277416 #7 Oct 26 2016 15:21:03 %S A277416 0,1,2,4,3,10,8,14,5,32,27,71,16,105,36,57,6,134,118,918,66,2361,415, %T A277416 1224,28,1902,551,4969,92,2545,217,374,7,940,803 %N A277416 Inverse permutation to A277415. %C A277416 a(n) = the position of A260443(n) in A260442. %H A277416 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %o A277416 (Scheme) %o A277416 (definec (A277416 n) (let ((b (A260443 n))) (let loop ((k 0)) (if (= (A260442 k) b) k (loop (+ 1 k)))))) ;; Very crude. %Y A277416 Inverse: A277415. %Y A277416 Cf. A260442, A260443. %K A277416 nonn,more %O A277416 0,3 %A A277416 _Antti Karttunen_, Oct 14 2016