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 A245401 #14 Jul 22 2014 20:11:36 %S A245401 8,8,8,8,8,8,8,8,16,16,16,16,24,24,32,32,40,40,48,56,64,72,80,96,112, %T A245401 128,144,160,184,216,240,280,320,360,416,472,544,616,704,808,920,1056, %U A245401 1208,1376,1576,1800,2056,2352,2688,3072,3512,4008,4584 %N A245401 Number of nonnegative integers with property that their base 8/7 expansion (see A024649) has n digits. %C A245401 The numbers 8-15 are represented by 70, 71, 72, 73, 74, 75, 76, 77 respectively in base 8/7. These are the only integers with two digits, and so a(2)=8. %F A245401 a(n) = 8*A120186(n). %o A245401 (Sage) %o A245401 A=[1] %o A245401 for i in [1..60]: %o A245401 A.append(ceil((8-7)/7*sum(A))) %o A245401 [8*x for x in A] %Y A245401 Cf. A081848, A024649, A120186. %K A245401 nonn,base %O A245401 1,1 %A A245401 _James Van Alstine_, Jul 21 2014