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A251202 Number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock summing to a nonzero multiple of 2 1
40, 1246, 102811, 27920380, 29868134632, 129855805888645, 2203266860629332142, 141756509654699247308602, 34090982077422268972865847281, 30409612013209091174685207093821492 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A251210

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..11

EXAMPLE

Some solutions for n=3

..2..2..0..2....0..2..2..2....2..2..0..0....1..2..2..1....0..0..0..1

..0..2..2..2....2..0..0..2....0..0..2..0....1..2..0..1....2..2..0..1

..0..2..2..0....0..0..2..2....0..2..0..2....0..1..1..0....0..2..2..1

..0..2..2..2....0..2..0..0....0..0..0..2....2..1..1..2....0..2..2..1

CROSSREFS

Sequence in context: A061650 A006101 A278381 * A239189 A188253 A049396

Adjacent sequences:  A251199 A251200 A251201 * A251203 A251204 A251205

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified June 20 19:27 EDT 2019. Contains 324234 sequences. (Running on oeis4.)