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 A327577 #16 Sep 18 2019 10:32:27 %S A327577 1,4,5,10,7,26,11,20,19,32,17,52,22,36,38,44,28,78,32,64,49,60,38,104, %T A327577 47,70,61,78,49,196,53,88,75,94,66,162,64,104,88,134,70,216,74,120, %U A327577 123,128,80,214,85,168,117,144,91,240,103,162,131,160,101,392,108,172,152,178,122,296 %N A327577 Numbers of zeroless polydivisible numbers with all digits the same in base n. %H A327577 Seiichi Manyama, <a href="/A327577/b327577.txt">Table of n, a(n) for n = 2..10000</a> %H A327577 Wikipedia, <a href="https://en.wikipedia.org/wiki/Polydivisible_number">Polydivisible number</a>. %F A327577 a(n) = A327545(n,1). %F A327577 a(n) = Sum_{k=1..n-1} A327571(n,k). %e A327577 n | zeroless polydivisible numbers with all digits the same in base n %e A327577 --+------------------------------------------------------------------ %e A327577 2 | [1] %e A327577 3 | [1, 11], [2, 22] %e A327577 4 | [1], [2, 22, 222], [3] %e A327577 So a(2) = 1, a(3) = 4, a(4) = 5. %Y A327577 Cf. A327545, A327571. %K A327577 nonn,base,look %O A327577 2,2 %A A327577 _Seiichi Manyama_, Sep 17 2019