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 A084919 #2 Mar 31 2012 13:21:56
%S A084919 1,1,3,4,5,6,7,56,36,45,55,66,78,91,1365,560,680,816,969,1140,1330,
%T A084919 1540,1771,42504,12650,14950,17550,20475,23751,27405,31465,35960,
%U A084919 40920,46376,1623160,376992,435897
%N A084919 First differences of A048093.
%o A084919 (PARI) { v=[0, 1, 2, 5, 9, 14, 20, 27, 83, 119, 164, 219, 285, 363, 454, 1819, 2379, 3059, 3875, 4844, 5984, 7314, 8854, 10625, 53129, 65779, 80729, 98279, 118754, 142505, 169910, 201375, 237335, 278255, 324631, 1947791, 2324783, 2760680]; for (i=1, length(v)-1, print1(v[i+1]-v[i]", ")) }
%Y A084919 Cf. A048093.
%K A084919 nonn
%O A084919 1,3
%A A084919 _Jon Perry_, Jun 11 2003