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

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