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A205998 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero 9
26, 92, 92, 330, 498, 330, 1184, 2712, 2712, 1184, 4250, 14866, 22612, 14866, 4250, 15252, 81278, 189430, 189430, 81278, 15252, 54738, 445352, 1588523, 2437024, 1588523, 445352, 54738, 196448, 2436706, 13324720, 31326018, 31326018, 13324720 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.....26.......92.......330........1184..........4250...........15252

.....92......498......2712.......14866.........81278..........445352

....330.....2712.....22612......189430.......1588523........13324720

...1184....14866....189430.....2437024......31326018.......403768668

...4250....81278...1588523....31326018.....619044912.....12247835464

..15252...445352..13324720...403768668...12247835464....372736115952

..54738..2436706.111764603..5195655486..242338696294..11329617750556

.196448.13344256.937463556.66947088104.4795751505632.344896522846756

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..312

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

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

CROSSREFS

Sequence in context: A048509 A044213 A044594 * A205991 A259291 A038654

Adjacent sequences:  A205995 A205996 A205997 * A205999 A206000 A206001

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 02 2012

STATUS

approved

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Last modified February 21 05:22 EST 2020. Contains 332086 sequences. (Running on oeis4.)