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 A248987 T(n,k)=Number of length n+4 0..k arrays with every five consecutive terms having two times the sum of some three elements equal to three times the sum of the remaining two 11
 2, 53, 2, 204, 53, 2, 585, 204, 53, 2, 1326, 585, 204, 53, 2, 2817, 1654, 585, 204, 53, 2, 5028, 4137, 2042, 585, 204, 53, 2, 8789, 7964, 6065, 2494, 585, 204, 53, 2, 13970, 14661, 12644, 8873, 3014, 585, 204, 53, 2, 21601, 23778, 24583, 20128, 12937, 3606 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts .2.53.204.585.1326...2817...5028....8789...13970...21601....31512....45353 .2.53.204.585.1654...4137...7964...14661...23778...39441....60264....90193 .2.53.204.585.2042...6065..12644...24583...40878...72399...115668...180421 .2.53.204.585.2494...8873..20128...41419...70770..133223...222176...361717 .2.53.204.585.3014..12937..32094...70037..123076..245471...426828...726053 .2.53.204.585.3606..18737..51166..118685..214530..452471...819664..1457951 .2.53.204.585.4742..30017..86800..206989..376806..854053..1617708..2998849 .2.53.204.585.6130..47953.147582..362631..665532.1612155..3189728..6170069 .2.53.204.585.7782..76161.250880..637211.1180180.3039269..6274962.12677003 .2.53.204.585.9710.119849.425828.1122703.2100020.5721757.12312020.25999019 LINKS R. H. Hardin, Table of n, a(n) for n = 1..2166 FORMULA Empirical for column k: k=1: a(n) = a(n-1) k=2: a(n) = a(n-1) k=3: a(n) = a(n-1) k=4: a(n) = a(n-1) k=5: [linear recurrence of order 21] k=6: [order 51] Empirical for row n: n=1: [linear recurrence of order 12; also a polynomial of degree 4 plus a quadratic quasipolynomial with period 6] EXAMPLE Some solutions for n=6 k=4 ..2....2....2....1....2....2....1....3....2....2....3....3....1....2....4....4 ..0....4....4....1....0....1....1....2....3....0....2....2....4....2....0....4 ..0....2....4....3....4....1....2....4....1....4....1....3....3....3....4....2 ..1....0....3....4....4....4....3....1....4....3....2....0....4....1....2....1 ..2....2....2....1....0....2....3....0....0....1....2....2....3....2....0....4 ..2....2....2....1....2....2....1....3....2....2....3....3....1....2....4....4 ..0....4....4....1....0....1....1....2....3....0....2....2....4....2....0....4 ..0....2....4....3....4....1....2....4....1....4....1....3....3....3....4....2 ..1....0....3....4....4....4....3....1....4....3....2....0....4....1....2....1 ..2....2....2....1....0....2....3....0....0....1....2....2....3....2....0....4 CROSSREFS Sequence in context: A000654 A061306 A249656 * A179616 A200087 A139841 Adjacent sequences:  A248984 A248985 A248986 * A248988 A248989 A248990 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Oct 18 2014 STATUS approved

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Last modified September 19 06:16 EDT 2020. Contains 337177 sequences. (Running on oeis4.)