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A235559
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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
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4
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256, 2612, 2612, 23024, 86742, 23024, 180640, 2481481, 2481481, 180640, 1321956, 58495571, 269127070, 58495571, 1321956, 9182760, 1190247008, 24006644081, 24006644081, 1190247008, 9182760, 61590128, 21374536916, 1779283912244
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OFFSET
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1,1
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COMMENTS
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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
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LINKS
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FORMULA
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Empirical for column 1: [linear recurrence of order 38]
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EXAMPLE
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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
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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