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A209375

1/4 the number of (n+1)X(n+1) 0..2 arrays with every 2X2 subblock having distinct edge sums.

4, 17, 64, 512, 2176, 52784, 242176, 22205984, 103942144, 39954751040, 183158185984, 304199179800704, 1345426301157376, 9591893861120254208, 41024530124682428416, 1232880451618561434845696

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OFFSET

1,1

COMMENTS

Diagonal of A209382

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..17

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A191272 A122231 A119916 * A005784 A095252 A181410

Adjacent sequences: A209372 A209373 A209374 * A209376 A209377 A209378

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 07 2012

STATUS

approved

URL: https://oeis.org/A209375

⇱ A209375 - OEIS