A254258 - OEIS

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A254258

Number of (n+2) X (6+2) 0..1 arrays with every 3 X 3 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.

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

Cf. A254260.

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