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 A032904 #13 Jan 29 2019 04:18:55
%S A032904 1,2,3,4,5,6,7,8,14,15,16,21,22,23,24,28,29,30,31,32,35,36,37,38,39,
%T A032904 40,42,43,44,45,46,47,48,56,57,63,64,65,70,71,72,73,77,78,79,80,81,84,
%U A032904 85,86,87,88,89,91,92,93,94,95,96,97,112,113,114,119,120,121,122,126,127
%N A032904 Numbers whose base-7 representation Sum_{i=0..m} d(i)*7^i has d(0) <= d(1) >= d(2) <= ...
%e A032904 a(36)=63 since 63 = 49 + 7 + 7 is written 120 in base 7 and 0 <= 2 >= 1.
%Y A032904 Cf. A023763.
%Y A032904 Cf. A032845, A032854, A032870, A032886, A032895, A032904.
%K A032904 nonn,base
%O A032904 1,2
%A A032904 _Clark Kimberling_
%E A032904 Corrected by _Henry Bottomley_, Jul 03 2000