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 A239256 T(n,k)=Number of nXk 0..4 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 5 9
 4, 13, 13, 41, 142, 41, 131, 1440, 1440, 131, 419, 14685, 47066, 14685, 419, 1339, 150265, 1536913, 1536913, 150265, 1339, 4279, 1536541, 50317761, 160787652, 50317761, 1536541, 4279, 13675, 15708373, 1646590515, 16849285277, 16849285277 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .....4.........13.............41.................131.....................419 ....13........142...........1440...............14685..................150265 ....41.......1440..........47066.............1536913................50317761 ...131......14685........1536913...........160787652.............16849285277 ...419.....150265.......50317761.........16849285277...........5651220281864 ..1339....1536541.....1646590515.......1764528331828........1894001136279187 ..4279...15708373....53870354874.....184748227954044......634624599110230148 .13675..160597823..1762466898003...19343554404948583...212646525863761263724 .43703.1641932577.57663066044594.2025327665047217766.71252844784847254804435 LINKS R. H. Hardin, Table of n, a(n) for n = 1..144 FORMULA Empirical for column k: k=1: a(n) = 3*a(n-1) +2*a(n-3) k=2: [order 25] EXAMPLE Some solutions for n=3 k=4 ..0..0..0..4....0..0..0..2....0..0..0..0....0..0..0..0....0..0..2..4 ..0..0..3..2....4..4..3..4....0..3..0..3....2..4..3..2....0..0..0..4 ..0..2..0..0....3..1..2..1....4..2..4..2....0..2..1..1....0..3..2..0 CROSSREFS Sequence in context: A168401 A081738 A232496 * A043049 A135465 A135783 Adjacent sequences:  A239253 A239254 A239255 * A239257 A239258 A239259 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Mar 13 2014 STATUS approved

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Last modified August 2 02:53 EDT 2021. Contains 346409 sequences. (Running on oeis4.)