A205466 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor

256, 2120, 2120, 17920, 34792, 17920, 151824, 597288, 597288, 151824, 1285076, 10306944, 22414008, 10306944, 1285076, 10876432, 177411808, 843904488, 843904488, 177411808, 10876432, 92062852, 3053150968, 31625643196

Offset

1,1

Comments

Table starts

.......256.........2120............17920..............151824

......2120........34792...........597288............10306944

.....17920.......597288.........22414008...........843904488

....151824.....10306944........843904488.........69248994984

...1285076....177411808......31625643196.......5649505038240

..10876432...3053150968....1185601231024.....461355684937208

..92062852..52550629576...44457471151176...37682835967710128

.779221408.904498008200.1666962268642872.3077546846103277112

Links

R. H. Hardin, Table of n, a(n) for n = 1..84

Example

Some solutions for n=4 k=3
..0..0..1..2....1..0..2..0....1..0..0..0....0..2..0..3....1..0..0..1
..3..3..0..3....1..2..3..0....0..3..3..2....0..2..1..3....1..2..1..1
..3..3..3..1....0..1..0..2....1..1..0..0....1..3..3..0....3..0..0..3
..0..2..1..1....3..2..1..1....1..1..3..1....2..2..0..0....0..0..0..3
..3..3..3..2....1..3..1..1....1..3..0..1....2..2..2..1....3..2..2..0

Crossrefs

Sequence in context: A236451 A236445 A205954 * A205459 A237076 A237069

Adjacent sequences: A205463 A205464 A205465 * A205467 A205468 A205469

Keyword

nonn,tabl

Author

R. H. Hardin Jan 27 2012

Status

approved