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 A238812 T(n,k)=Number of nXk 0..2 arrays with no element equal to one plus the sum of elements to its left or one plus the sum of the elements above it, modulo 3 8
 2, 3, 3, 4, 8, 4, 5, 15, 15, 5, 6, 25, 48, 25, 6, 7, 39, 118, 118, 39, 7, 8, 58, 254, 468, 254, 58, 8, 9, 83, 498, 1501, 1501, 498, 83, 9, 10, 115, 916, 4167, 7502, 4167, 916, 115, 10, 11, 155, 1605, 10423, 31125, 31125, 10423, 1605, 155, 11, 12, 204, 2702, 24115 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ..2...3....4......5.......6........7..........8...........9...........10 ..3...8...15.....25......39.......58.........83.........115..........155 ..4..15...48....118.....254......498........916........1605.........2702 ..5..25..118....468....1501.....4167......10423.......24115........52449 ..6..39..254...1501....7502....31125.....111564......356666......1041746 ..7..58..498...4167...31125...197418....1055763.....4880856.....19977948 ..8..83..916..10423..111564..1055763....8526852....58670336....348923836 ..9.115.1605..24115..356666..4880856...58670336...605163204...5342432459 .10.155.2702..52449.1041746.19977948..348923836..5342432459..70386525080 .11.204.4395.108395.2828429.73988808.1828642499.40798150971.796431939717 LINKS R. H. Hardin, Table of n, a(n) for n = 1..312 FORMULA k=1: a(n) = n + 1 k=2: a(n) = (1/6)*n^3 + (23/6)*n - 1 k=3: [polynomial of degree 6] for n>2 k=4: [polynomial of degree 10] for n>4 k=5: [polynomial of degree 15] for n>6 k=6: [polynomial of degree 21] for n>8 k=7: [polynomial of degree 28] for n>10 EXAMPLE Some solutions for n=5 k=4 ..0..2..2..0....2..2..0..0....0..0..0..0....0..0..0..2....0..2..2..0 ..0..2..1..2....2..1..2..2....0..0..0..0....0..2..2..1....0..2..2..0 ..0..0..0..2....0..0..2..2....0..2..2..0....0..2..2..0....2..1..0..2 ..2..1..0..0....0..0..0..0....0..2..1..2....2..1..0..2....2..2..0..1 ..2..2..0..0....0..0..0..0....0..0..2..2....2..2..0..1....0..0..0..0 Empirical for column k: CROSSREFS Sequence in context: A047079 A207624 A203990 * A227269 A156353 A239849 Adjacent sequences: A238809 A238810 A238811 * A238813 A238814 A238815 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Mar 05 2014 STATUS approved

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Last modified May 24 12:49 EDT 2024. Contains 372773 sequences. (Running on oeis4.)