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

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

Offset

1,2

Links

Table of n, a(n) for n=1..10.

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.

Crossrefs

Sequence in context: A300513 A089035 A327145 * A361217 A000573 A070019

Adjacent sequences: A089513 A089514 A089515 * A089517 A089518 A089519

Keyword

nonn,easy

Author

Wolfdieter Lang, Dec 01 2003

Status

approved