A212660 Partial products of A001037.

1, 1, 2, 2, 4, 12, 72, 648, 11664, 349920, 19595520, 1939956480, 360831905280, 120878688268800, 76153573609344000, 88414298960448384000, 192920000331698373888000, 787113601353329365463040000, 6068645866434169407720038400000, 88189561731021349832987598028800000, 2433502766405803127291459780006707200000

Offset

0,3

Links

Vaclav Kotesovec, Table of n, a(n) for n = 0..87

Formula

a(n) ~ c * 2^(n*(n-1)/2) / (n-1)!, where c = 0.18825081393898549708320124490005954688085915771535493512047809133677598879... - Vaclav Kotesovec, Feb 16 2026

Crossrefs

Cf. A001037.

Sequence in context: A007181 A100238 A208529 * A098774 A009264 A380215

Adjacent sequences: A212657 A212658 A212659 * A212661 A212662 A212663

Keyword

nonn

Author

N. J. A. Sloane, May 23 2012

Status

approved