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 A252105 T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 4 6 or 7 9
 2458, 4581, 4581, 6549, 4866, 6549, 10605, 5087, 5087, 10605, 21457, 8941, 10878, 8941, 21457, 38599, 21405, 26996, 26996, 21405, 38599, 70372, 50222, 86550, 86575, 86550, 50222, 70372, 150102, 120128, 252110, 329544, 329544, 252110, 120128 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ...2458....4581.....6549.....10605......21457.......38599........70372 ...4581....4866.....5087......8941......21405.......50222.......120128 ...6549....5087....10878.....26996......86550......252110.......727203 ..10605....8941....26996.....86575.....329544.....1129324......3681127 ..21457...21405....86550....329544....1704334.....7637420.....31734323 ..38599...50222...252110...1129324....7637420....41913367....204205735 ..70372..120128...727203...3681127...31734323...204205735...1113772174 .150102..312242..2385233..14793289..169483164..1415634760..10036222063 .279508..762514..7252003..52094021..790459932..8021937546..65817065181 .526503.1878978.21530207.172583949.3479889673.40908964043.375634409542 LINKS R. H. Hardin, Table of n, a(n) for n = 1..448 FORMULA Empirical for column k: k=1: [linear recurrence of order 69] for n>77 k=2: [order 47] for n>53 k=3: [order 57] for n>62 k=4: [order 66] for n>71 k=5: [order 99] for n>104 EXAMPLE Some solutions for n=4 k=4 ..1..3..3..1..3..3....0..2..1..1..2..1....3..2..2..0..2..2....2..3..2..2..0..2 ..0..3..3..1..3..0....0..1..3..0..1..3....3..2..2..3..2..2....3..1..3..3..1..0 ..2..1..1..2..1..1....3..1..0..3..1..0....1..0..3..1..3..0....2..0..2..2..3..2 ..1..3..0..1..3..3....1..2..1..1..2..1....0..2..2..3..2..2....2..3..2..2..3..2 ..1..0..3..1..0..3....0..1..3..0..1..3....3..2..2..0..2..2....3..1..3..3..1..0 ..2..1..1..2..1..0....3..1..0..3..1..0....1..3..0..1..3..0....2..3..2..2..0..2 CROSSREFS Sequence in context: A191383 A206409 A252013 * A252098 A252097 A252225 Adjacent sequences: A252102 A252103 A252104 * A252106 A252107 A252108 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Dec 14 2014 STATUS approved

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Last modified August 6 15:42 EDT 2024. Contains 374974 sequences. (Running on oeis4.)