A089516 Denominators used in A089515 to compute the column sequences of triangle A090215.

1, 4, 56, 5712, 18786768, 955776822000, 744550144338000, 187882017072683934000, 114232266380191831872000, 1559289924571192031300084690688000

Offset: 1

Author

Wolfdieter Lang, Dec 01 2003

Keywords

• nonn
• easy

Formula

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.