A231991 Number of (n+1)X(n+1) 0..1 arrays with no element having a strict majority of its horizontal and antidiagonal neighbors equal to one

4, 32, 1024, 80511, 15594601, 9716967198, 17330552348004, 86052358301456560, 1193370539733163272100, 47736311347811120780540634, 5427560264549933547128560973449, 1747506522236821289436659004322720324

Offset

1,1

Comments

Diagonal of A231997

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

Example

Some solutions for n=4
..1..0..0..0..1....0..0..0..0..0....0..0..0..1..0....0..0..0..1..0
..0..0..0..0..0....0..0..1..0..0....0..0..0..0..0....0..0..0..0..0
..0..1..1..0..0....0..0..0..1..1....0..1..0..1..0....1..0..0..0..1
..0..0..0..0..0....0..0..0..0..0....1..0..0..0..0....0..0..0..0..0
..1..0..0..0..0....1..0..0..0..1....0..0..0..0..0....0..1..0..0..1

Crossrefs

Sequence in context: A243918 A370544 A298896 * A028369 A081790 A053005

Adjacent sequences: A231988 A231989 A231990 * A231992 A231993 A231994

Keyword

nonn

Author

R. H. Hardin, Nov 16 2013

Status

approved