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 A316717 #12 Jan 16 2019 04:51:49 %S A316717 0,0,0,1,0,0,1,0,0,0,1,1,1,0,0,0,1,0,0,1,1,1,1,2,0,0,0,1,0,0,1,0,0,0, %T A316717 1,1,1,1,1,1,2,1,1,2,0,0,0,1,0,0,1,0,0,0,1,1,1,0,0,0,1,0,0,1,1,1,1,2, %U A316717 1,1,1,2,1,1,2,1,1,1,2,2,2,0,0,0,1,0,0,1,0,0,0,1,1,1,0,0,0,1,0,0,1 %N A316717 a(n) is the number of 3s in A316713(n). That is, a(n) is the number of C-sequences (A278041) used in the tribonacci ABC-representation of n >= 0. %C A316717 The number of 1s and 2s in A316713(n) is given in A316715 and A316716, respectively. %H A316717 Wolfdieter Lang, <a href="https://arxiv.org/abs/1810.09787">The Tribonacci and ABC Representations of Numbers are Equivalent</a>, arXiv preprint arXiv:1810.09787 [math.NT], 2018. %F A316717 a(n) = number of 3s in A316713(n), that is the number of Cs in the tribonacci ABC-representation of n >= 0. %e A316717 See column #(3) in A316713. %Y A316717 Cf. A316713, A316714, A316715, A316716. %K A316717 nonn %O A316717 0,24 %A A316717 _Wolfdieter Lang_, Sep 11 2018