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

Author

Clark Kimberling, Jul 28 2024

Keywords

• nonn

Comments

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

Crossrefs

Cf. A000032, A374654, A374661.

Programs

Mathematica

w[n_] := Product[LucasL[k] + 4, {k, 0, n}]
Table[w[n], {n, 0, 20}]