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 A074364 #11 Mar 22 2023 08:15:50 %S A074364 0,1,1,2,1,4,2,7,1,10,4,15,2,21,7,30,1,38,10,49,4,63,15,82,2,99,21, %T A074364 122,7,150,30,187,1,218,38,257,10,305,49,364,4,417,63,484,15,562,82, %U A074364 659,2,743,99,844,21,964,122,1107,7,1236,150,1393,30,1573,187,1790,1,1978,218 %N A074364 Semi-tribonacci numbers, from tribonacci by analogy with semi-Fibonacci sequence. %H A074364 T. D. Noe, <a href="/A074364/b074364.txt">Table of n, a(n) for n = 0..10000</a> %H A074364 Cristina Ballantine and George Beck, <a href="https://arxiv.org/abs/2303.11493">Partitions enumerated by self-similar sequences</a>, arXiv:2303.11493 [math.CO], 2023. %H A074364 M. J. Halm, <a href="http://untilheaven.tripod.com/id112.htm">Sequences</a> %F A074364 a(0) = 0, a(1) = 1, a(2n) = a(n), a(2n+1) = a(2n)+a(2n-1)+a(2n-2) %e A074364 a(4)=1 because a(4/2)=a(2)=1. %Y A074364 Cf. A030067, A000073. %K A074364 nonn %O A074364 0,4 %A A074364 _Michael Joseph Halm_, Feb 13 2003