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A251435 Number of (n+1)X(1+1) 0..3 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements 1
192, 2312, 27486, 327033, 3888017, 46227589, 549607078, 6534412622, 77688966462, 923660531016, 10981592676546, 130562451319000, 1552284257397407, 18455431860393891, 219420485113354861, 2608735989678877133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A251442

LINKS

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

FORMULA

Empirical: a(n) = 11*a(n-1) +20*a(n-2) -109*a(n-3) -48*a(n-4) +138*a(n-5) -46*a(n-6) -68*a(n-7) +48*a(n-8) -7*a(n-9) -9*a(n-10)

EXAMPLE

Some solutions for n=3

..0..1....2..1....0..0....3..0....2..2....2..2....2..3....2..2....2..3....1..3

..0..0....3..2....1..0....3..3....3..0....3..0....0..2....0..3....1..2....0..2

..2..1....1..0....1..3....0..2....1..1....3..3....0..3....0..1....0..1....0..2

..2..0....0..0....3..0....3..2....2..3....2..1....0..2....3..3....3..2....3..2

CROSSREFS

Sequence in context: A051526 A188786 A251442 * A183710 A183702 A351632

Adjacent sequences:  A251432 A251433 A251434 * A251436 A251437 A251438

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 02 2014

STATUS

approved

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Last modified June 27 19:31 EDT 2022. Contains 354898 sequences. (Running on oeis4.)