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A235521 T(n,k) = Number of (n+1) X (k+1) 0..3 arrays with 2 X 2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise. 6
256, 2272, 2272, 20164, 61080, 20164, 131208, 1693053, 1649707, 131208, 853776, 33809449, 136233789, 32516127, 853776, 4548852, 677462696, 8689553076, 8849747316, 636820654, 4548852, 24235929, 10650729023, 540301382239 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......256..........2272............20164............131208.............853776

......2272.........61080..........1693053..........33809449..........677462696

.....20164.......1649707........136233789........8689553076.......540301382239

....131208......32516127.......8849747316.....2001758743204....439572860964268

....853776.....636820654.....569055271070...448691506243509.339098156459115852

...4548852....9861273365...29822537207178.85371358783135523

..24235929..152479393753.1571264979362306

.112067172.1957874677935

.518199696

LINKS

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

FORMULA

Empirical for column and row 1: [linear recurrence of order 50].

EXAMPLE

Some solutions for n=2, k=4

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

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

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

CROSSREFS

Sequence in context: A236495 A236118 A236113 * A235652 A235518 A206109

Adjacent sequences:  A235518 A235519 A235520 * A235522 A235523 A235524

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 11 2014

STATUS

approved

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Last modified May 28 05:47 EDT 2022. Contains 354112 sequences. (Running on oeis4.)