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 A107975 #5 Jul 30 2015 23:01:36
%S A107975 5,10,11,11,12,13,14,15,16,18,19,22,23,27,28,33,34,40,41,49,50,59,61,
%T A107975 63,65,68,70,77,79,87,90,93,96,100,104,104,108,109,113,122,127,127,
%U A107975 132,141,147,148,154,157,163,168,174,182,189,189,196,203,210,219,227,234,243
%N A107975 First differences give the same sequence written as a string of individual digits.
%e A107975 5.10.11.11.12.13.14.15.16.18 ... <- sequence
%e A107975 .5..1..0..1..1..1..1..1..2 ... <- first differences are the sequence's digits.
%t A107975 a[1] = 5; a[n_] := a[n] = a[n - 1] + Flatten[ Table[ IntegerDigits[ a[i]], {i, n - 1}]][[n - 1]]; Table[ a[n], {n, 61}] (* _Robert G. Wilson v_, Jun 15 2005 *)
%Y A107975 Cf. A100787, A107974, A107975, A107976, A107977 for "seeds" 1, 3, 5, 7 and 9.
%K A107975 base,easy,nonn
%O A107975 1,1
%A A107975 _Eric Angelini_, Jun 12 2005
%E A107975 Edited and extended by _Robert G. Wilson v_, Jun 15 2005