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A254258 Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
1021428, 10193041, 43088793, 49369118, 159041102, 325742026, 933774220, 3391678348, 9927463676, 34363573228, 120867828716, 419133745900, 1533506476524, 5688509028844, 21334401501676, 81613015824876 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A254260

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +12*a(n-2) -48*a(n-3) -176*a(n-4) +80*a(n-5) +1792*a(n-6) +640*a(n-7) -6400*a(n-8) -10240*a(n-9) +14336*a(n-10) +32768*a(n-11) -32768*a(n-12) for n>20

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A190381 A295437 A254265 * A254304 A346266 A218019

Adjacent sequences:  A254255 A254256 A254257 * A254259 A254260 A254261

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 27 2015

STATUS

approved

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Last modified November 28 12:09 EST 2021. Contains 349401 sequences. (Running on oeis4.)