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A235506 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise 5
256, 2982, 2982, 33640, 108648, 33640, 343500, 3945383, 3945383, 343500, 3415268, 123132965, 490074558, 123132965, 3415268, 32611962, 3714091695, 51929974331, 51929974331, 3714091695, 32611962, 306033109, 103423011021, 5302813444717 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......256.........2982...........33640..............343500..............3415268

.....2982.......108648.........3945383...........123132965...........3714091695

....33640......3945383.......490074558.........51929974331........5302813444717

...343500....123132965.....51929974331......19569523022916.....7279199801456820

..3415268...3714091695...5302813444717....7279199801456820.10251146884479114976

.32611962.103423011021.486511569699939.2418013523229434607

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..49

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 22]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A236142 A236139 A235747 * A235502 A236202 A236199

Adjacent sequences:  A235503 A235504 A235505 * A235507 A235508 A235509

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 11 2014

STATUS

approved

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Last modified February 26 02:42 EST 2021. Contains 341619 sequences. (Running on oeis4.)