Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #10 Mar 15 2018 04:19:14
%S 1,5,100,27500,687500,7075062500,3594287401375000,
%T 81456034414253835114625000,35683959264371194185124824344091625000,
%U 140789696830026154896057937831705061406034875000
%N Denominators used to compute the column sequences of triangle A090217.
%C a(n) = lcm(seq(denominator(a(n,m)),m=1..n)) with the a(n,m) formula given in A090435(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