A181028 Number of n X n binary matrices that are completed draws in n-in-a-row tic-tac-toe, with 0 going first

0, 0, 16, 5356, 3126376, 6882462624, 54014711203135

Offset

1,3

Comments

Diagonal of A181029

Links

Table of n, a(n) for n=1..7.

Example

Some solutions for 4X4
..0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1
..0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1
..0..1..1..1....1..0..1..1....1..1..1..0....1..1..1..0....1..1..1..0
..1..1..1..0....1..1..1..0....0..1..1..1....1..0..1..1....1..1..0..1

Crossrefs

Sequence in context: A201241 A123280 A289904 * A258583 A337796 A159403

Adjacent sequences: A181025 A181026 A181027 * A181029 A181030 A181031

Keyword

nonn

Author

R. H. Hardin Sep 30 2010

Status

approved