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 A374864 #10 Aug 28 2024 10:57:31
%S A374864 1,3,18,144,1584,22176,354816,6741504,141571584,3397718016,
%T A374864 91738386432,2660413206528,85133222608896,2979662791311360,
%U A374864 110247523278520320,4409900931140812800,185215839107914137600,8334712759856136192000,400066212473094537216000
%N A374864 Obverse convolution (1)**A001950; see Comments.
%C A374864 See A374848 for the definition of obverse convolution and a guide to related sequences. a(n+1)/a(n) is an integer for n>=0, so (a(n)) is a divisibility sequence.
%F A374864 a(n) = Product_{k=0..n} A026352(k).
%t A374864 r = GoldenRatio;
%t A374864 s[n_] := 1; t[n_] := Floor[n*r^2];
%t A374864 u[n_] := Product[s[k] + t[n - k], {k, 0, n}]
%t A374864 Table[u[n], {n, 0, 20}]
%Y A374864 Cf. A000012, A000201, A001622, A026352, A374848.
%K A374864 nonn
%O A374864 0,2
%A A374864 _Clark Kimberling_, Aug 18 2024