A374657 a(n) = (1/4) A374656(n).

1, 3, 15, 90, 810, 10530, 210600, 6528600, 319901400, 24952309200, 3119038650000, 626926768650000, 203124273042600000, 106233994801279800000, 89767725607081431000000, 122622713179273234746000000, 270873573413014575553914000000

Offset

0,2

Comments

a(n+1)/a(n) is an integer for n>=0, so (a(n)) is a divisibility sequence.

Links

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

Mathematica

w[n_] := Product[LucasL[k] + 2, {k, 0, n}]
(1/4) Table[w[n], {n, 0, 20}]

Crossrefs

Cf. A000032, A374654, A374656.

Sequence in context: A024339 A319950 A336743 * A034954 A077783 A347319

Adjacent sequences: A374654 A374655 A374656 * A374658 A374659 A374660

Keyword

nonn

Author

Clark Kimberling, Jul 28 2024

Status

approved