The On-Line Encyclopedia of Integer Sequences (OEIS)

A133413 revision #4

A133413

Half the number of ways of placing up to n^2 pawns on an n x n chessboard so that it balances at its midpoint.

1, 2, 24, 492, 202064, 100202536, 888531141152, 8548846756027594, 1400822035743239844640, 241149984205773848119833656, 691305758149247080625180837349904

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

OFFSET

1,2

LINKS

Table of n, a(n) for n=1..11.

CROSSREFS

Sequence in context: A341958 A360975 A052712 * * A012236 A186414

Adjacent sequences: A133410 A133411 A133412 * A133414 A133415 A133416

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 25 2007

STATUS

approved