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A217633 Number of nX4 arrays of the minimum value of corresponding elements and their horizontal and vertical neighbors in a random 0..1 nX4 array 1
6, 38, 244, 1418, 8706, 52120, 315378, 1900838, 11472148, 69210290, 417586442, 2519466108, 15201104542, 91714930026, 553357475040, 3338651662490, 20143579337906, 121535200857060, 733276159043790, 4424182455856594 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A217637

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..64

FORMULA

Empirical: a(n) = 4*a(n-1) +20*a(n-2) -29*a(n-3) -124*a(n-4) +55*a(n-5) +330*a(n-6) -57*a(n-7) -498*a(n-8) -291*a(n-9) +965*a(n-10) +676*a(n-11) -991*a(n-12) -659*a(n-13) +771*a(n-14) +610*a(n-15) -581*a(n-16) -78*a(n-17) -36*a(n-18) +32*a(n-19) -94*a(n-20) +32*a(n-21) +68*a(n-22) -16*a(n-23)

EXAMPLE

Some solutions for n=3

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

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

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

CROSSREFS

Sequence in context: A037676 A180030 A135030 * A162558 A215466 A147957

Adjacent sequences:  A217630 A217631 A217632 * A217634 A217635 A217636

KEYWORD

nonn

AUTHOR

R. H. Hardin Oct 09 2012

STATUS

approved

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Last modified February 22 01:32 EST 2019. Contains 320381 sequences. (Running on oeis4.)