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 A077505 #8 Jul 12 2015 15:48:41 %S A077505 3,7,1,21,11,3,23,11,7,21,7,21,3,7,7,9,29,9,11,59,97,3,11,163,147,91, %T A077505 87,23,7,291,167,337,73,93,133,3,177,257,7,149,103,3,27,13,39,137,19, %U A077505 31,351,209,151,489,101,153,281,139,81,47,367,189,47,29,199,3,1,63,29,83 %N A077505 a(n) = A077504(n) - n*10^d where d = n - number of digits in n. %C A077505 A guess: number of digits in a(n) < log(n) for large n. %e A077505 a(5) = 50021 - 50000 = 21. %Y A077505 Cf. A077504, A088104, A088105, A088754, A088755. %K A077505 base,nonn %O A077505 2,1 %A A077505 _Amarnath Murthy_, Nov 08 2002 %E A077505 More terms from _Sascha Kurz_, Jan 04 2003