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 A173513 #17 Jul 05 2025 09:55:15
%S A173513 1,1,2,2,3,3,4,5,7,9,11,14,18,23,30,38,49,63,80,103,132,169,216,277,
%T A173513 355,454,582,745,954,1222,1565,2005,2568,3289,4212,5395,6910,8850,
%U A173513 11335,14517,18593,23814,30500,39064,50032,64080,82072,105116,134630,172431,220846
%N A173513 a(n) = ceiling(A173510(n)/2).
%F A173513 a(n) = A173510(n) - floor(A173510(n)/2).
%t A173513 l[0] = 2; l[1] = 1;
%t A173513 l[n_] := l[n] = l[n - 1] + l[n - 2] - Floor[l[n - 1]/2]
%t A173513 Table[l[n] - Floor[l[n]/2], {n, 0, 30}]
%Y A173513 Cf. A000032, A173497, A173510, A173508.
%K A173513 nonn
%O A173513 0,3
%A A173513 _Roger L. Bagula_, Nov 23 2010
%E A173513 More terms from _Amiram Eldar_, Jul 05 2025