A127646 a(n) is the product of first n terms of sequence A127644.

3, 18, 162, 2916, 34992, 559872, 4478976, 107495424, 3439853568, 116955021312, 3508650639360, 168415230689280, 2526228460339200, 2526228460339200, 35367198444748800, 70734396889497600, 1202484747121459200

Offset

1,1

Comments

a(n) is divisible by A127645(n).

Links

Michael De Vlieger, Table of n, a(n) for n = 1..449

Mathematica

f[l_List] := Block[{k = 1, s = Plus @@ l, p = Times @@ l}, While[Or[MemberQ[l, k], Mod[k p, k + s] > 0], k++]; Append[l, k]]; FoldList[Times, Nest[f, {3}, 17]] (* Michael De Vlieger, Sep 20 2017, after Ray Chandler at A127644 *)

Crossrefs

Cf. A127644, A127645.

Sequence in context: A364432 A065058 A032031 * A089466 A302585 A107403

Adjacent sequences: A127643 A127644 A127645 * A127647 A127648 A127649

Keyword

nonn

Author

Leroy Quet, Jan 22 2007

Extensions

Extended by Ray Chandler, Jan 22 2007

Status

approved