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A223676 Number of nX4 0..1 arrays with rows and antidiagonals unimodal 1
11, 121, 1118, 9822, 85663, 744272, 6458585, 56030742, 486038270, 4215998078, 36570143008, 317213501163, 2751542844692, 23867162292347, 207026174729348, 1795765890711121, 15576654086308004, 135113465080900087 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A223680

LINKS

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

FORMULA

Empirical: a(n) = 11*a(n-1) -21*a(n-2) +18*a(n-3) -114*a(n-4) +183*a(n-5) -96*a(n-6) +80*a(n-7) -65*a(n-8) +16*a(n-9)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A307861 A106473 A125315 * A132583 A007907 A171285

Adjacent sequences:  A223673 A223674 A223675 * A223677 A223678 A223679

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 25 2013

STATUS

approved

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Last modified November 27 20:49 EST 2021. Contains 349395 sequences. (Running on oeis4.)