A374661 a(n) = (1/6)*A374660(n).

1, 5, 35, 280, 3080, 46200, 1016400, 33541200, 1710601200, 136848096000, 17379708192000, 3528080762976000, 1150154328730176000, 603831022583342400000, 511444876128091012800000, 699656590543228505510400000, 1546940721691078225683494400000

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] + 4, {k, 0, n}]
(1/6) Table[w[n], {n, 0, 20}]

Crossrefs

Cf. A000142, A374654, A374660.

Sequence in context: A084135 A229111 A138233 * A322666 A248053 A369157

Adjacent sequences: A374658 A374659 A374660 * A374662 A374663 A374664

Keyword

nonn

Author

Clark Kimberling, Aug 03 2024

Status

approved