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 A275851 #7 Aug 11 2016 23:48:57 %S A275851 1,0,1,0,1,0,2,0,1,0,1,0,2,1,1,0,0,0,2,1,0,0,1,0,3,1,1,0,1,0,2,0,1,0, %T A275851 1,0,2,1,1,0,0,0,2,1,0,0,1,0,3,1,2,1,2,1,2,0,1,0,1,0,1,0,1,0,0,0,1,0, %U A275851 0,0,1,0,3,2,2,1,1,1,1,0,1,0,0,0,2,1,1,0,0,0,1,1,0,0,0,0,3,2,1,1,2,1,1,0,0,0,1,0,1,1,0,0,0,0,2,1,0,0,1,0,4 %N A275851 a(n) = number of elements in range [1..(1+A084558(n))] fixed by the permutation with rank n of permutation list A060117 (or A060118). %H A275851 Antti Karttunen, <a href="/A275851/b275851.txt">Table of n, a(n) for n = 0..40320</a> %H A275851 <a href="/index/Fa#facbase">Index entries for sequences related to factorial base representation</a> %F A275851 a(n) = A056169(A275725(n)). %F A275851 a(n) = 1 + A084558(n) - A060129(n). %o A275851 (Scheme, two variants) %o A275851 (define (A275851 n) (A056169 (A275725 n))) %o A275851 (define (A275851 n) (- (+ 1 (A084558 n)) (A060129 n))) %Y A275851 Cf. A060117, A060118. %Y A275851 Cf. A056169, A060129, A084558, A275725. %Y A275851 Cf. A275852 (indices of zeros). %K A275851 nonn %O A275851 0,7 %A A275851 _Antti Karttunen_, Aug 11 2016