A209645 - OEIS

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A209645

Number of n X n 0..1 arrays avoiding 0 0 1 and 1 0 0 horizontally and 0 0 1 and 1 0 1 vertically

2, 16, 102, 630, 4690, 34012, 287140, 2364992, 22028490, 200930125, 2026692954, 20118254688, 217071252489, 2316174126448, 26506083938686, 301219138880440, 3632894429145798, 43657425153387876, 552138493209771090

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

OFFSET

1,1

COMMENTS

Diagonal of A209650

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..38

EXAMPLE

Some solutions for n=4

..0..1..0..1....1..1..0..1....0..0..0..0....1..0..1..1....1..0..1..0

..0..0..0..0....1..1..1..0....0..0..0..0....0..1..1..0....0..1..1..0

..0..0..0..0....0..1..1..0....0..0..0..0....0..1..1..0....0..0..0..0