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A251983
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T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum not 0 1 2 7 8 or 9 and every diagonal and antidiagonal sum 0 1 2 7 8 or 9
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9
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2930, 9822, 9822, 41682, 73222, 41682, 138390, 516108, 516108, 138390, 463054, 2703512, 4379034, 2703512, 463054, 1762248, 16324414, 26230040, 26230040, 16324414, 1762248, 6881308, 113817844, 196459816, 153525420, 196459816
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OFFSET
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1,1
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COMMENTS
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Table starts
.....2930.......9822........41682.......138390.........463054.........1762248
.....9822......73222.......516108......2703512.......16324414.......113817844
....41682.....516108......4379034.....26230040......196459816......1645790820
...138390....2703512.....26230040....153525420.....1175144274.....11222619848
...463054...16324414....196459816...1175144274....10630171636....144374047558
..1762248..113817844...1645790820..11222619848...144374047558...2806746475910
..6881308..782954632..13277304274..98312125934..1633057450764..41357385753908
.25756230.5188534650.103969785600.803257677008.16362554029592.560931930325822
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LINKS
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FORMULA
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Empirical for column k:
k=1: [linear recurrence of order 31] for n>34
k=2: [order 47] for n>53
k=3: [order 56] for n>60
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EXAMPLE
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Some solutions for n=2 k=4
..0..3..0..3..0..1....0..3..0..2..1..3....0..3..0..3..0..3....0..3..1..2..0..1
..3..0..3..0..3..0....3..0..3..0..3..1....3..0..3..0..3..1....3..0..3..0..3..0
..0..3..0..3..1..2....0..3..0..3..0..2....1..2..0..3..0..1....1..2..0..3..0..3
..2..0..2..1..2..1....2..2..2..1..1..2....2..2..2..0..2..1....2..1..2..0..3..0
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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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