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 A256265 #18 Apr 19 2015 22:31:15 %S A256265 1,3,7,11,15,23,35,43,47,55,67,79,95,123,155,171,175,183,195,207,223, %T A256265 251,283,303,319,347,387,439,503,579,651,683,687,695,707,719,735,763, %U A256265 795,815,831,859,899,951,1015,1091,1163,1199,1215,1243,1283,1335,1399,1475,1563,1663,1775,1899,2035,2183,2343,2515,2667,2731 %N A256265 Sums of two successive terms of A256264. %C A256265 First differs from A139250 (the toothpick sequence) at a(27). %C A256265 It appears that both sequences share infinitely many terms, for example: a(1)..a(26), a(31)..a(42), a(47)..a(50), a(63)..a(74), a(79)..a(82), etc. %C A256265 The main entry for this sequence is A256263. %F A256265 a(n) = A256264(n) + A256264(n-1). %Y A256265 Cf. A007583, A139250, A255747, A256260, A256261, A256263, A256264. %K A256265 nonn %O A256265 1,2 %A A256265 _Omar E. Pol_, Apr 10 2015