A144422 a(n) = n!*A144416(n).

1, 3, 62, 5052, 1087104, 487424520, 393702654960, 519740602925040, 1046019551260199040, 3046052768591313895680, 12322848899623787148556800, 67036205966744406283600262400, 477463744343745629221074425625600, 4354451197836949908463868034925593600

Offset

0,2

Comments

Number of placing of at least n objects but no more than 3*n distinct objects in n distinct boxes with the condition that in each box there is at least 1 object but no more than 3. - Adi Dani, May 04 2011

Links

David Applegate and N. J. A. Sloane, Table of n, a(n) for n = 0..100

Crossrefs

Sequence in context: A177496 A104403 A301609 * A327053 A135444 A333041

Adjacent sequences: A144419 A144420 A144421 * A144423 A144424 A144425

Keyword

nonn

Author

David Applegate and N. J. A. Sloane, Dec 08 2008, corrected Jan 14 2009

Status

approved