A232030 Number of (n+1)X(n+1) 0..1 arrays with every element equal to some horizontal, vertical or antidiagonal neighbor, with top left element zero

3, 76, 6958, 2504637, 3495632937, 18901428867727, 396123615709336849, 32176890056971879660693, 10130525958339456502522410735, 12362161675037799092546476765921887

Offset

1,1

Comments

Diagonal of A232038

Links

R. H. Hardin, Table of n, a(n) for n = 1..12

Example

Some solutions for n=3
..0..1..1..1....0..0..0..1....0..0..1..0....0..0..0..0....0..0..0..0
..0..1..0..1....0..0..0..1....1..0..1..0....1..0..0..0....0..1..0..0
..1..0..0..0....0..0..1..1....1..1..1..1....1..0..0..0....0..1..0..1
..0..0..1..1....0..1..1..1....0..0..0..1....0..1..1..0....1..0..1..1

Crossrefs

Sequence in context: A300386 A054747 A302375 * A054950 A335722 A183961

Adjacent sequences: A232027 A232028 A232029 * A232031 A232032 A232033

Keyword

nonn

Author

R. H. Hardin, Nov 17 2013

Status

approved