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A251096 Number of (n+1)X(4+1) 0..1 arrays with no 2X2 subblock having its minimum diagonal element less than its minimum antidiagonal element 1
406, 5817, 82814, 1175519, 16697127, 237288487, 3372537762, 47933018061, 681254534234, 9682407527191, 137612328359012, 1955831221215641, 27797479224555547, 395074912980985813, 5615048233207846538 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A251100

LINKS

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

FORMULA

Empirical: a(n) = 32*a(n-1) -408*a(n-2) +3073*a(n-3) -15730*a(n-4) +58157*a(n-5) -160070*a(n-6) +333703*a(n-7) -532992*a(n-8) +656691*a(n-9) -625063*a(n-10) +457960*a(n-11) -256393*a(n-12) +108609*a(n-13) -34260*a(n-14) +7752*a(n-15) -1136*a(n-16) +80*a(n-17)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A203937 A203714 A203710 * A233052 A210329 A317982

Adjacent sequences:  A251093 A251094 A251095 * A251097 A251098 A251099

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 29 2014

STATUS

approved

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Last modified May 20 09:02 EDT 2022. Contains 353870 sequences. (Running on oeis4.)