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A258910 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal median plus antidiagonal median nondecreasing horizontally and vertically 7
512, 2736, 2736, 11872, 15416, 11872, 51856, 86968, 86968, 51856, 222400, 510095, 659792, 510095, 222400, 914112, 2769733, 5271330, 5271330, 2769733, 914112, 3644672, 14722533, 38603552, 58411404, 38603552, 14722533, 3644672, 14254784 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......512......2736.......11872........51856.........222400..........914112

.....2736.....15416.......86968.......510095........2769733........14722533

....11872.....86968......659792......5271330.......38603552.......279149887

....51856....510095.....5271330.....58411404......575237942......5661517795

...222400...2769733....38603552....575237942.....7595409032....100897843080

...914112..14722533...279149887...5661517795...100897843080...1832394625108

..3644672..77704089..2026873370..55658584373..1346660412346..33594417416223

.14254784.402403692.14414890711.532429444542.17454653713101.594433786098630

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..144

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 22]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

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

CROSSREFS

Column 1 is A253986

Sequence in context: A254819 A254505 A253993 * A253986 A250826 A250504

Adjacent sequences: A258907 A258908 A258909 * A258911 A258912 A258913

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jun 14 2015

STATUS

approved

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Last modified December 6 13:35 EST 2022. Contains 358638 sequences. (Running on oeis4.)