A374660 a(n) = Product_{k=0..n+1} L(k)+4, where L=A000032 (Lucas numbers).

6, 30, 210, 1680, 18480, 277200, 6098400, 201247200, 10263607200, 821088576000, 104278249152000, 21168484577856000, 6900925972381056000, 3622986135500054400000, 3068669256768546076800000, 4197939543259371033062400000, 9281644330146469354100966400000

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] + 4, {k, 0, n}]
Table[w[n], {n, 0, 20}]

Crossrefs

Cf. A000032, A374654, A374661.

Sequence in context: A336509 A147779 A054721 * A074111 A231209 A073087

Adjacent sequences: A374657 A374658 A374659 * A374661 A374662 A374663

Keyword

nonn

Author

Clark Kimberling, Jul 28 2024

Status

approved