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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 1
4, 32, 1024, 80511, 15594601, 9716967198, 17330552348004, 86052358301456560, 1193370539733163272100, 47736311347811120780540634, 5427560264549933547128560973449, 1747506522236821289436659004322720324 (list; graph; refs; listen; history; text; internal format)
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: A136471 A243918 A298896 * A028369 A081790 A053005

Adjacent sequences:  A231988 A231989 A231990 * A231992 A231993 A231994

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 16 2013

STATUS

approved

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Last modified September 25 11:03 EDT 2021. Contains 347654 sequences. (Running on oeis4.)