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A235559 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing rowwise and columnwise 4
256, 2612, 2612, 23024, 86742, 23024, 180640, 2481481, 2481481, 180640, 1321956, 58495571, 269127070, 58495571, 1321956, 9182760, 1190247008, 24006644081, 24006644081, 1190247008, 9182760, 61590128, 21374536916, 1779283912244 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......256........2612.........23024........180640.......1321956.........9182760

.....2612.......86742.......2481481......58495571....1190247008.....21374536916

....23024.....2481481.....269127070...24006644081.1779283912244.111365596706324

...180640....58495571...24006644081.8553264090329

..1321956..1190247008.1779283912244

..9182760.21374536916

.61590128

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..31

FORMULA

Empirical for column 1: [linear recurrence of order 38]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A236601 A236597 A235779 * A235556 A236624 A236620

Adjacent sequences:  A235556 A235557 A235558 * A235560 A235561 A235562

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 12 2014

STATUS

approved

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Last modified June 25 13:19 EDT 2022. Contains 354851 sequences. (Running on oeis4.)