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

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