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A236943 Number of (n+1)X(2+1) 0..3 arrays with the maximum of every 2X2 subblock equal 1
2796, 112888, 4301002, 178006252, 7270497452, 302691231316, 12569519212796, 524245234532960, 21854738428787466, 911985738401725660, 38053568649173120756, 1588184219431937362884, 66282825930461723853260 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236949

LINKS

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

FORMULA

Empirical: a(n) = 50*a(n-1) +99*a(n-2) -21884*a(n-3) +120364*a(n-4) +1009876*a(n-5) -7817815*a(n-6) +7902410*a(n-7) +19309801*a(n-8) -28628820*a(n-9) +8125920*a(n-10)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A340174 A252900 A236637 * A236777 A210104 A235276

Adjacent sequences:  A236940 A236941 A236942 * A236944 A236945 A236946

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 01 2014

STATUS

approved

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Last modified August 5 11:48 EDT 2021. Contains 346467 sequences. (Running on oeis4.)