A374659 a(n) = (1/5) A374658(n).

1, 4, 24, 168, 1680, 23520, 493920, 15805440, 790272000, 62431488000, 7866367488000, 1589006232576000, 516427025587200000, 270607761407692800000, 228934166150908108800000, 312953005128291384729600000, 691626141333523960252416000000

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] + 3, {k, 0, n}]
(1/5) Table[w[n], {n, 0, 20}]

Crossrefs

Cf. A000142, A374654, A374658.

Sequence in context: A188913 A364324 A052685 * A221088 A365225 A369478

Adjacent sequences: A374656 A374657 A374658 * A374660 A374661 A374662

Keyword

nonn

Author

Clark Kimberling, Jul 28 2024

Status

approved