A181752 The number of paths of a chess rook in a 7D hypercube, from (0..0) to (n..n), where the rook may move in steps that are multiples of (1,0..0), (0,1,0..0), ..., (0..0,1).

1, 5040, 1781750880, 1224777388630320, 1139907455908263095760, 1261774625300967410997361200, 1562711749309729990152410055981840, 2093930745462011336917616846237237197680, 2973970378870521024883907518445574302750687520

Offset

0,2

Links

Table of n, a(n) for n=0..8.

Example

a(1) = 5040 because there are 5040 rook paths from (0..0) to (1..1).

Crossrefs

Row d=7 of A181731.

Sequence in context: A287083 A158039 A071549 * A208193 A259112 A195391

Adjacent sequences: A181749 A181750 A181751 * A181753 A181754 A181755

Keyword

nonn

Author

Manuel Kauers, Nov 16 2010

Status

approved