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A267785 Number of nX5 0..1 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value. 1
28, 784, 5004, 34173, 122770, 460598, 1234716, 3380133, 7591852, 17155354, 34199992, 67950531, 124234066, 225071767, 385178280, 650960709, 1057141184, 1692165611, 2633057784, 4034703001, 6058479774, 8956146100, 13048584888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A267788.

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=4

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

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

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

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

CROSSREFS

Cf. A267788.

Sequence in context: A207917 A208163 A207959 * A223496 A208043 A208032

Adjacent sequences: A267782 A267783 A267784 * A267786 A267787 A267788

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 20 2016

STATUS

approved

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Last modified February 8 15:39 EST 2023. Contains 360149 sequences. (Running on oeis4.)