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 A170962 #13 Jan 05 2021 02:39:51
%S A170962 1,0,0,1,0,0,0,1,0,0,1,1,0,0,1,1,0,0,2,1,0,1,2,1,0,1,3,1,0,2,3,1,0,3,
%T A170962 4,1,1,4,4,0,1,5,4,0,2,7,3,0,3,7,3,0,5,8,2,1,6,8,2,1,8,8,1,2,9,7,1,3,
%U A170962 11,7,0,5,11,5,0,6,12,4,1,8,11,3,1,9,11,2,2,11,9,1,3,11,8,1,4,12,6,0,5,11,5
%N A170962 Expansion of Product_{i=1..m} (1 + x^(4*i-1)) for m = 9.
%C A170962 Product_{i=1..m} (1 + x^(4*i-1)) is the Poincaré polynomial for both Sp(2m) and O(2m+1).
%D A170962 H. Weyl, The Classical Groups, Princeton, 1946, see p. 238.
%H A170962 Nathaniel Johnston, <a href="/A170962/b170962.txt">Table of n, a(n) for n = 0..171</a> (full sequence)
%F A170962 a(n) = a(171-n). - _Rick L. Shepherd_, Mar 01 2013
%Y A170962 Cf. A000700, A147599, A169975, A170956-A170965.
%K A170962 nonn,fini,full,easy
%O A170962 0,19
%A A170962 _N. J. A. Sloane_, Aug 29 2010