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A235779 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 columnwise and nonincreasing rowwise 3
256, 2612, 2612, 23024, 68942, 23024, 180640, 1581879, 1581879, 180640, 1321956, 30969609, 101237218, 30969609, 1321956, 9182760, 545929374, 5639406769, 5639406769, 545929374, 9182760, 61590128, 8741113000, 284827103857 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
......256.......2612........23024.......180640......1321956........9182760
.....2612......68942......1581879.....30969609....545929374.....8741113000
....23024....1581879....101237218...5639406769.284827103857.12969746978427
...180640...30969609...5639406769.960684617696
..1321956..545929374.284827103857
..9182760.8741113000
.61590128
LINKS
EXAMPLE
Some solutions for n=2 k=4
..0..0..0..0..0....0..0..0..0..0....0..0..0..0..3....0..0..0..0..2
..0..1..3..0..3....2..1..2..0..3....1..1..1..0..2....2..2..1..0..3
..2..0..3..3..2....2..0..2..0..1....1..0..3..3..0....3..0..2..2..1
CROSSREFS
Column 1 is A235556
Sequence in context: A188705 A236601 A236597 * A235559 A235556 A236624
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Jan 15 2014
STATUS
approved

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Last modified April 19 08:20 EDT 2024. Contains 371782 sequences. (Running on oeis4.)