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A236282 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and columnwise 4
81, 432, 432, 2304, 5805, 2304, 9504, 87450, 87450, 9504, 39204, 901317, 4297035, 901317, 39204, 138402, 9293996, 134940646, 134940646, 9293996, 138402, 488601, 73777097, 4211459815, 13055877546, 4211459815, 73777097, 488601, 1553877 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......81.........432...........2304.............9504.............39204

......432........5805..........87450...........901317...........9293996

.....2304.......87450........4297035........134940646........4211459815

.....9504......901317......134940646......13055877546.....1257559565027

....39204.....9293996.....4211459815....1257559565027...374969850504444

...138402....73777097....95929739101...86958471603770.79511653034814238

...488601...583531732..2162880693927.5933159964415314

..1553877..3814287681.38763321249354

..4941729.24858329516

.14587326

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 26]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Column 1 is A235417

Sequence in context: A236604 A236698 A235421 * A235417 A237391 A237385

Adjacent sequences:  A236279 A236280 A236281 * A236283 A236284 A236285

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 21 2014

STATUS

approved

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Last modified January 19 20:41 EST 2020. Contains 331066 sequences. (Running on oeis4.)