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 A256976 #15 Jan 31 2024 11:06:41
%S A256976 1,1,2,3,6,7,11,15,22,28,38,47,64,77,99,120,152,179,221,260,316,367,
%T A256976 439,506,600,685,800,910,1056,1190,1368,1536,1753,1957,2217,2464,2778,
%U A256976 3073,3441,3795,4232,4645,5155,5643,6237,6804,7489
%N A256976 G.f.: (1 + x^4 - x^5 - x^6 - x^10 - x^11 + x^12 + x^16)/Product_{i=1..8} (1 - x^i).
%D A256976 J. C. P. Miller, On the enumeration of partially ordered sets of integers, pp. 109-124 of T. P. McDonough and V. C. Mavron, editors, Combinatorics: Proceedings of the Fourth British Combinatorial Conference 1973. London Mathematical Society, Lecture Note Series, Number 13, Cambridge University Press, NY, 1974. The g.f. is G_{ref}(t) on page 122, corrected. (The version of G_{ref}(t) stated on page 122 gives A256975, which does not match the terms on page 123.)
%H A256976 Ray Chandler, <a href="/A256976/b256976.txt">Table of n, a(n) for n = 0..1000</a>
%H A256976 <a href="/index/Rec#order_34">Index entries for linear recurrences with constant coefficients</a>, signature (-1, 0, 1, 2, 2, 2, 1, 0, -2, -4, -5, -4, -2, 0, 3, 5, 6, 5, 3, 0, -2, -4, -5, -4, -2, 0, 1, 2, 2, 2, 1, 0, -1, -1).
%p A256976 (1+x^4-x^5-x^6-x^10-x^11+x^12+x^16)/mul(1-x^i, i=1..8);
%Y A256976 Cf. A256975.
%K A256976 nonn
%O A256976 0,3
%A A256976 _N. J. A. Sloane_, Apr 22 2015