A205996 Number of (n+1)X7 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two, and every 2X2 determinant nonzero

15252, 445352, 13324720, 403768668, 12247835464, 372736115952, 11329617750556, 344896522846756, 10488581198699106, 319255436413700648, 9710750954285060690, 295543172702892331212, 8990520513073214869046

Offset

1,1

Comments

Column 6 of A205998

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Sequence in context: A233924 A115924 A251952 * A296087 A252318 A233602

Adjacent sequences: A205993 A205994 A205995 * A205997 A205998 A205999

Keyword

nonn

Author

R. H. Hardin Feb 02 2012

Status

approved