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 A202864 T(n,k) = Number of n X n 0..k arrays with row and column sums one greater than the previous row and column. 9
 2, 3, 2, 4, 6, 2, 5, 12, 42, 2, 6, 20, 228, 1346, 2, 7, 30, 776, 41852, 223456, 2, 8, 42, 2046, 491892, 80524892, 202999208, 2, 9, 56, 4578, 3436102, 5393851108, 1720483641156, 1049899768685, 2, 10, 72, 9128, 17232446, 147978735402, 1081958661341802 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS Table of n, a(n) for n=1..42. EXAMPLE Table starts .2.............3.............4................5............6........7....8..9 .2.............6............12...............20...........30.......42...56.72 .2............42...........228..............776.........2046.....4578.9128 .2..........1346.........41852...........491892......3436102.17232446 .2........223456......80524892.......5393851108.147978735402 .2.....202999208.1720483641156.1081958661341802 .2.1049899768685 .2 Some solutions for n=4 k=3 ..0..1..1..3....1..0..2..1....1..1..0..2....2..1..0..1....1..0..1..0 ..1..2..1..2....0..1..1..3....3..0..1..1....1..1..0..3....0..1..1..1 ..2..0..2..3....3..3..0..0....0..2..3..1....0..2..3..1....0..0..1..3 ..2..3..3..0....0..1..3..3....0..2..2..3....1..1..3..2....1..2..1..1 CROSSREFS Row 2 is A002378. Sequence in context: A194998 A215190 A214943 * A328880 A291290 A006047 Adjacent sequences: A202861 A202862 A202863 * A202865 A202866 A202867 KEYWORD nonn,tabl,more AUTHOR R. H. Hardin, Dec 25 2011 STATUS approved

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Last modified September 16 10:53 EDT 2024. Contains 375965 sequences. (Running on oeis4.)