A258525 Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

14184, 92996, 523716, 1455282, 3806582, 11711440, 35610562, 114007482, 361659778, 1120640520, 3663319530, 11761984674, 37533685074, 120519971192, 385359250346, 1242349766402, 4027691968226, 12950233669160, 41756033526570

Offset

1,1

Comments

Column 3 of A258530

Links

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

Formula

Empirical: a(n) = 2*a(n-1) +11*a(n-2) -8*a(n-3) -27*a(n-4) +14*a(n-5) -83*a(n-6) -1344*a(n-7) +68*a(n-8) +8440*a(n-9) +5152*a(n-10) -15424*a(n-11) -28416*a(n-12) +17280*a(n-13) +47104*a(n-14) -32768*a(n-15) for n>23

Example

Some solutions for n=2
..0..0..0..0..1....0..1..0..1..1....0..1..1..1..0....1..0..1..0..0
..0..1..1..1..1....0..0..1..0..1....0..0..0..1..1....0..0..0..0..0
..1..1..0..0..1....0..0..1..0..0....0..1..1..1..1....0..0..0..1..1
..0..1..0..1..0....0..1..0..1..0....0..1..1..0..1....0..1..0..0..1

Crossrefs

Cf. A258530

Sequence in context: A251068 A184559 A258532 * A254917 A270800 A271247

Adjacent sequences: A258522 A258523 A258524 * A258526 A258527 A258528

Keyword

nonn

Author

R. H. Hardin, Jun 02 2015

Status

approved