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 A257773 #4 May 08 2015 16:55:11 %S A257773 1,2,2,2,2,2,2,2,2,2,10,10,7,6,4,4,4,4,3,2,5,7,5,4,3,3,3,3,2,2,4,5,4, %T A257773 4,2,3,3,2,2,2,3,4,4,3,3,3,2,1,2,1,2,3,2,3,3,2,2,2,2,1,2,2,3,3,2,1,2, %U A257773 2,1,2,2,3,3,2,2,2,1,2,1,1,2,3,2,2,2,1 %N A257773 Number of numbers k, 0 <= k <= 9, such that n is a Belgian-k number. %C A257773 See A106039 for definition of Belgian-k numbers. %C A257773 row lengths in A257770; %C A257773 a(A257785(n)) = 1; %C A257773 For n > 1: a(A007088(n)) = 10. %H A257773 Reinhard Zumkeller, <a href="/A257773/b257773.txt">Table of n, a(n) for n = 0..10000</a> %o A257773 (Haskell) %o A257773 a257773 = length . a257770_row %Y A257773 Cf. A106039, A257770, A257785, A007088. %K A257773 nonn %O A257773 0,2 %A A257773 _Reinhard Zumkeller_, May 08 2015