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 A305714 #6 Jun 09 2018 08:42:54 %S A305714 1,1,1,2,0,0,2,0,1,1,1 %N A305714 Number of finite sequences of positive integers of length n that are polydivisible and strictly pandigital. %C A305714 A sequence q of length k is strictly pandigital if it is a permutation of {1,2,...,k}. It is polydivisible if Sum_{i = 1...m} 10^(m - i) * q_i is a multiple of m for all 1 <= m <= k. %e A305714 Sequence of sets of n-digit numbers that are weakly polydivisible and strictly pandigital is (with A = 10): %e A305714 {0} %e A305714 {1} %e A305714 {12} %e A305714 {123,321} %e A305714 {} %e A305714 {} %e A305714 {123654,321654} %e A305714 {} %e A305714 {38165472} %e A305714 {381654729} %e A305714 {381654729A} %Y A305714 Cf. A000670, A010784, A030299, A050289, A143671, A144688, A156069, A156071, A158242, A163574, A240763, A305701, A305712, A305715. %K A305714 nonn,full,base,fini %O A305714 0,4 %A A305714 _Gus Wiseman_, Jun 08 2018