A374658 a(n) = Product_{k=0..n} L(k)+3, where L=A000032 (Lucas numbers).

5, 20, 120, 840, 8400, 117600, 2469600, 79027200, 3951360000, 312157440000, 39331837440000, 7945031162880000, 2582135127936000000, 1353038807038464000000, 1144670830754540544000000, 1564765025641456923648000000, 3458130706667619801262080000000

Offset

0,1

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}]
Table[w[n], {n, 0, 20}]

Crossrefs

Cf. A000032, A374654, A374659.

Sequence in context: A332710 A352743 A054720 * A208941 A209069 A301952

Adjacent sequences: A374655 A374656 A374657 * A374659 A374660 A374661

Keyword

nonn

Author

Clark Kimberling, Jul 28 2024

Status

approved