A183965 - OEIS

A183965

Number of (n+1) X 4 0..2 arrays with no 2 X 2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one.

2601, 43163, 746017, 14219749, 272110811, 5344196941, 105022040225, 2080498882227, 41211666924625, 818324217080925, 16247715840561235, 322838617011302501, 6414430376916521533, 127476935064286493051

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 3 of A183971.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 3 X 4

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

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

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

...

...3..4..5.......2..2..2.......4..5..6.......2..3..2.......6..6..6...

...4..5..4.......2..1..2.......4..5..6.......3..4..3.......5..6..5...

CROSSREFS

Cf. A183971.

Sequence in context: A203257 A326260 A262799 * A031549 A031729 A001726

Adjacent sequences: A183962 A183963 A183964 * A183966 A183967 A183968

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 08 2011

STATUS

approved