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 A319948 #17 Oct 03 2018 05:41:04
%S A319948 1,3,12,72,504,4536,45360,544320,7076160,106142400,1698278400,
%T A319948 30569011200,580811212800,12197035468800,268334780313600,
%U A319948 6440034727526400,161000868188160000,4347023441080320000,121716656350248960000,3651499690507468800000
%N A319948 a(n) = Product_{i=1..n} floor(3*i/2).
%F A319948 a(n) ~ (3/2)^n * n! * 2^(1/6) * sqrt(Pi) / (Gamma(1/3) * n^(1/6)).
%F A319948 Recurrence: 4*a(n) - 6*a(n-1) - 3*(n - 1)*(3*n - 4)*a(n-2) = 0, with n >= 3. - _Bruno Berselli_, Oct 03 2018
%t A319948 Table[Product[Floor[i*3/2], {i, 1, n}], {n, 1, 20}]
%t A319948 RecurrenceTable[{4 a[n] - 6 a[n - 1] - 3 (n - 1) (3 n - 4) a[n - 2] == 0, a[1] == 1, a[2] == 3}, a, {n, 1, 20}] (* _Bruno Berselli_, Oct 03 2018 *)
%Y A319948 Cf. A010786, A180736, A275062, A319949, A319950, A317980.
%K A319948 nonn
%O A319948 1,2
%A A319948 _Vaclav Kotesovec_, Oct 02 2018