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 A257270 T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum 5
 9300, 119716, 119716, 1257600, 2292196, 1257600, 13089924, 29746116, 29746116, 13089924, 121905264, 380991361, 358153488, 380991361, 121905264, 1125468304, 3966480400, 4497848356, 4497848356, 3966480400, 1125468304, 9711591328 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......9300.....119716.....1257600.....13089924.....121905264.....1125468304 ....119716....2292196....29746116....380991361....3966480400....40331082276 ...1257600...29746116...358153488...4497848356...39749497116...360292859536 ..13089924..380991361..4497848356..59496966400..498831438400..4488101568196 .121905264.3966480400.39749497116.498831438400.3433196592096.27752961899664 LINKS R. H. Hardin, Table of n, a(n) for n = 1..59 FORMULA Empirical for column k: k=1: [linear recurrence of order 48] EXAMPLE Some solutions for n=1 k=4 ..0..0..0..0..1..0....0..0..0..0..0..1....0..0..0..0..2..0....0..0..0..0..0..0 ..1..0..1..2..2..2....1..1..2..0..2..2....0..0..2..2..1..0....0..1..2..2..1..0 ..0..0..0..0..2..1....0..0..0..1..1..2....0..0..0..1..2..1....0..0..1..1..1..2 CROSSREFS Sequence in context: A100696 A225024 A237401 * A257385 A257266 A257380 Adjacent sequences:  A257267 A257268 A257269 * A257271 A257272 A257273 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Apr 19 2015 STATUS approved

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Last modified June 5 18:48 EDT 2020. Contains 334854 sequences. (Running on oeis4.)