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 A275839 #9 Aug 13 2016 11:09:37 %S A275839 0,1,2,5,6,14,24,54,120,145,264,411,464,720,842,1560,2042,2408,2670, %T A275839 5040,5766,10800,13686,16590,18144,40320,45384,85680,105864,106153, %U A275839 131184,141960,145728 %N A275839 Fixed points of permutations A275837 & A275838. %C A275839 Numbers n for which A225901(n) = A273667(n). %C A275839 If n is a member, then A153880(n) is also a member, thus sequence is infinite and all factorial numbers (A000142) are present. %H A275839 <a href="/index/Fa#facbase">Index entries for sequences related to factorial base representation</a> %o A275839 (Scheme, with _Antti Karttunen_'s IntSeq-library, two implementations) %o A275839 (define A275839 (FIXED-POINTS 0 0 A275837)) %o A275839 (define A275839 (MATCHING-POS 0 0 (lambda (n) (= (A225901 n) (A273667 n))))) %Y A275839 Cf. A000142 (a subsequence). %Y A275839 Cf. A153880, A225901, A273667, A275837, A275838. %K A275839 nonn,base %O A275839 0,3 %A A275839 _Antti Karttunen_, Aug 13 2016