A094271 First column of triangle A094270. Equals A094272(n)-(n-1).

1, 2, 4, 7, 12, 47, 1170, 687371, 236241851618, 2197451321740962081109754668237121, 2414396155710550624720051944524837499100253655538086242554948251365

Offset

1,2

Links

Martin Fuller, Table of n, a(n) for n = 1..12

Formula

a(n)=A094270(n,1). - R. J. Mathar, Jun 23 2006

Example

Product of the terms of the 4th row = 7*8*9*10 = 5040. Product of the terms of the 5th row = 12*13*14*15*16 = 524160 = 104*5040.

Crossrefs

Cf. A094270, A094272, A094273, A094274.

Sequence in context: A079800 A217595 A280028 * A194422 A177101 A018414

Adjacent sequences: A094268 A094269 A094270 * A094272 A094273 A094274

Keyword

nonn

Author

Amarnath Murthy, Apr 27 2004

Extensions

More terms from R. J. Mathar, Jun 23 2006

Edited by Martin Fuller, Jun 13 2007

Status

approved