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A184088 Number of (n+1)X3 0..3 arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one 1
216, 260, 1146, 2848, 9945, 28434, 87119, 254174, 732978, 2062353, 5663089, 15156140, 39373663, 99199976, 241889509, 570721800, 1303028175, 2880190406, 6168364480, 12813006924, 25845550887, 50691467373, 96800121980, 180213143357 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A184095

LINKS

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

EXAMPLE

Some solutions for 4X3

..2..2..3....0..0..1....1..2..2....1..1..3....1..2..2....0..0..1....1..1..2

..2..3..2....0..1..0....3..0..3....1..2..0....2..0..2....0..3..0....1..3..1

..2..3..3....1..0..1....3..0..3....1..2..1....2..1..2....1..0..2....2..0..3

..3..3..1....2..0..1....3..0..3....2..1..2....2..1..2....3..1..3....3..1..3

...

...9.10.......1..2.......6..7.......5..6.......5..6.......3..4.......6..7...

..10.11.......2..2.......6..6.......6..5.......5..5.......4..5.......6..7...

..11.10.......3..2.......6..6.......6..6.......6..6.......5..6.......6..7...

CROSSREFS

Sequence in context: A003998 A230400 A001239 * A205191 A204650 A115430

Adjacent sequences:  A184085 A184086 A184087 * A184089 A184090 A184091

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 09 2011

STATUS

approved

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Last modified November 15 08:37 EST 2019. Contains 329144 sequences. (Running on oeis4.)