A217369 a(n) = (product of previous terms) * (sum of previous terms), with a(1)=1, a(2)=4.

1, 4, 20, 2000, 324000000, 16796264976000000000000

Offset

1,2

Links

Table of n, a(n) for n=1..6.

Example

a(3) = (1+4) * (1*4) = 5*4 = 20

Crossrefs

Sequence in context: A074195 A376049 A332867 * A146342 A103896 A244955

Adjacent sequences: A217366 A217367 A217368 * A217370 A217371 A217372

Keyword

nonn

Author

Jon Perry, Oct 01 2012

Status

approved