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A267716 Number of nX5 0..1 arrays with every repeated value in every row and column greater than the previous repeated value. 1
12, 144, 546, 1915, 4444, 10489, 20226, 39485, 68430, 119560, 192852, 313293, 479670, 740131, 1089072, 1617072, 2306226, 3323353, 4621390, 6500801, 8852780, 12205815, 16330614, 22134297, 29166650, 38947360, 50640656, 66733431, 85743710 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A267719.

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) +8*a(n-2) -18*a(n-3) -27*a(n-4) +72*a(n-5) +48*a(n-6) -168*a(n-7) -42*a(n-8) +252*a(n-9) -252*a(n-11) +42*a(n-12) +168*a(n-13) -48*a(n-14) -72*a(n-15) +27*a(n-16) +18*a(n-17) -8*a(n-18) -2*a(n-19) +a(n-20) for n>22

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A267719.

Sequence in context: A208015 A208557 A183355 * A207309 A207115 A207395

Adjacent sequences:  A267713 A267714 A267715 * A267717 A267718 A267719

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 19 2016

STATUS

approved

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Last modified November 29 06:32 EST 2021. Contains 349416 sequences. (Running on oeis4.)