A172660 - OEIS

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A172660

Number of 2*n X 4 0..2 arrays with row sums 2 and column sums n

6, 282, 16260, 1093050, 79796556, 6152037276, 492872166072, 40629560387130, 3423871305383100, 293631119403639732, 25543657090245824712, 2248575441654260591964, 199926155194724792622600

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

R. H. Hardin, Table of n, a(n) for n=1..49

Andreas Stiller, Zahlen, bitte! 2,75 Billiarden - vom Skat und dem Zufall, heise online (in German)

CROSSREFS

Sequence in context: A163015 A049679 A201139 * A203051 A128792 A340540

Adjacent sequences: A172657 A172658 A172659 * A172661 A172662 A172663

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 06 2010

STATUS

approved