A392805 a(n) = (-1)^n*A387347(n,n).

1, 1, 1, 4, 9, 5184, 50, 25920000, 5023265625, 15366400000000, 395210285568, 5204203908995922001920000, 40054107573046875, 9190115890706074528512000000000000, 3914706236164400283750000000000000, 4545685741877955054368980992, 53937259628412917625487561458140625

Offset

0,4

Comments

The terms in this sequence are observed from the least common multiple (lcm) of the denominators in the normalized coefficients as given in the link in A387347 by A.H.M. Smeets.

Links

Table of n, a(n) for n=0..16.

Crossrefs

Cf. A387347, A392806 (prime factorization).

Sequence in context: A258660 A260305 A229338 * A389856 A111443 A299118

Adjacent sequences: A392802 A392803 A392804 * A392806 A392807 A392808

Keyword

nonn

Author

A.H.M. Smeets, Jan 23 2026

Status

approved