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 A364279 #15 Jul 23 2023 17:03:01 %S A364279 1,0,0,1,2,12,86,546,4284,39588,416988,4378848,54297504,695592000, %T A364279 9840307680,149031686880,2387863575360,40338090711360,736126007279040, %U A364279 13938942123429120,279358800902737920,5894877845100625920,129943826126987765760,2985640822908446976000 %N A364279 Number of permutations of [n] with distinct cycle lengths such that no cycle contains its length as an element. %H A364279 Wikipedia, <a href="https://en.wikipedia.org/wiki/Permutation">Permutation</a> %e A364279 a(3) = 1: (13)(2). %e A364279 a(4) = 2: (124)(3), (142)(3). %e A364279 a(5) = 12: (1235)(4), (1253)(4), (1325)(4), (1352)(4), (1523)(4), (1532)(4), (124)(35), (142)(35), (125)(34), (152)(34), (13)(245), (13)(254). %Y A364279 Cf. A000009, A007838, A362362, A364277, A364278, A364281, A364406. %K A364279 nonn %O A364279 0,5 %A A364279 _Alois P. Heinz_, Jul 17 2023