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 A022780 #6 Mar 15 2015 01:28:52
%S A022780 1,2,3,5,7,10,13,17,21,26,31,36,42,48,55,62,70,78,87,96,105,115,125,
%T A022780 136,147,159,171,184,197,210,224,238,253,268,284,300,317,334,351,369,
%U A022780 387,406,425,445,465,486,507,529,551,573,596,619,643,667,692
%N A022780 Place where n-th 1 occurs in A023118.
%H A022780 Clark Kimberling, <a href="/A022780/b022780.txt">Table of n, a(n) for n = 1..1000</a>
%F A022780 a(n) = n + 1 + Sum{floor[(n - k)/sqrt(5)], k = 0..n}.
%t A022780 Table[n + 1 + Sum[Floor[(n - k)/Sqrt[5]], {k, 0, n}], {n, 0, 200}] (* A022780 *)
%t A022780 (* _Clark Kimberling_, Mar 14 2015 *)
%Y A022780 Cf. A022776, A022778, A255977.
%K A022780 nonn
%O A022780 1,2
%A A022780 _Clark Kimberling_