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%I #10 Mar 15 2018 04:20:36
%S 1,4,56,5712,18786768,955776822000,744550144338000,
%T 187882017072683934000,114232266380191831872000,
%U 1559289924571192031300084690688000
%N Denominators used in A089515 to compute the column sequences of triangle A090215.
%F a(n) = lcm(seq(denominator(a(n, m)), m=1..n)) with the a(n, m) formula given in A089515(n, m) but without the D(n) factor in front and lcm denotes the least common multiple of a set of numbers.
%K nonn,easy
%O 1,2
%A _Wolfdieter Lang_, Dec 01 2003