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A204717 Number of (n+1)X3 0..1 arrays with the permanents of 2X2 subblocks nondecreasing rightwards and downwards 1
51, 261, 1271, 5821, 26128, 115060, 502546, 2181023, 9435107, 40725864, 175575234, 756334373, 3256622029, 14018388717, 60333239964, 259639675364, 1117272873312, 4807636088206, 20686854358737, 89012629944208, 383005849761933 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A204723

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) -a(n-2) -74*a(n-3) +80*a(n-4) +292*a(n-5) -406*a(n-6) -510*a(n-7) +827*a(n-8) +333*a(n-9) -745*a(n-10) +24*a(n-11) +246*a(n-12) -72*a(n-13)

EXAMPLE

Some solutions for n=4

..0..1..0....0..0..0....1..1..1....0..1..1....1..0..0....1..0..0....1..1..0

..1..1..1....1..0..1....1..0..1....0..0..1....1..0..1....0..0..1....1..0..1

..1..0..1....0..0..0....0..1..1....0..1..0....1..0..1....1..0..1....0..1..0

..1..1..0....0..1..1....1..1..0....1..1..1....1..0..1....0..1..1....1..1..1

..0..1..1....0..1..0....1..0..1....0..1..1....0..0..1....1..1..1....1..0..1

CROSSREFS

Sequence in context: A030535 A201813 A193250 * A253921 A204956 A243462

Adjacent sequences:  A204714 A204715 A204716 * A204718 A204719 A204720

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 18 2012

STATUS

approved

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Last modified October 16 12:07 EDT 2019. Contains 328056 sequences. (Running on oeis4.)