A096422 a(1)=a(2)=a(3)=1, a(n) = 2*a(n-1)*a(n-3) + a(n-3)^2 for n > 3.

1, 1, 1, 3, 7, 15, 99, 1435, 43275, 8578251, 24621639595, 2131004779672875, 36560587838053629502251, 1800363234260399608908512798220715, 7673165314712455021114657638259282344591507976875

Offset

1,4

Comments

a(n-3) divides a(n) for n > 3.

Links

Table of n, a(n) for n=1..15.

Crossrefs

Sequence in context: A378050 A258936 A336100 * A154795 A193831 A246719

Adjacent sequences: A096419 A096420 A096421 * A096423 A096424 A096425

Keyword

nonn

Author

Gerald McGarvey, Aug 08 2004

Extensions

Definition corrected by Georg Fischer, Aug 02 2024

Status

approved