A217370 a(n) = (product of previous terms) * (sum of previous terms), with a(1) = 2, a(2) = 3.

2, 3, 30, 6300, 7183890000, 58523836061676932100000000, 27902190435973847782838929289594860174185569868010410000000000000000

Offset

1,1

Links

Table of n, a(n) for n=1..7.

Example

a(3) = (2+3) * (2*3) = 5*6 = 30.

Mathematica

t = {2, 3}; Do[AppendTo[t, (Times @@ t) Total[t]], {5}]; t (* T. D. Noe, Oct 08 2012 *)

Prog

(Maxima)
a[0]:2$ a[1]:3$ a[n]:=sum(a[i], i, 0, n-1)*(prod(a[i], i, 0, n-1));
makelist(a[n], n, 0, 5); /* Martin Ettl, Oct 04 2012 */

Crossrefs

Sequence in context: A110351 A326224 A270483 * A088115 A230627 A048986

Adjacent sequences: A217367 A217368 A217369 * A217371 A217372 A217373

Keyword

nonn

Author

Jon Perry, Oct 01 2012

Status

approved