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 A268075 Number of n X 4 nonnegative integer arrays with new values introduced in each row and column in sequential order starting with zero. 1
 1, 8, 86, 1094, 15106, 216734, 3168306, 46777214, 694585586, 10350077054, 154574246386, 2311895643134, 34611510356466, 518504697774974, 7770897334266866, 116496760974182654, 1746784585901429746 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 36*a(n-1) - 463*a(n-2) + 2640*a(n-3) - 6700*a(n-4) + 6000*a(n-5). Empirical g.f.: x*(1 - 28*x + 261*x^2 - 938*x^3 + 1120*x^4) / ((1 - 2*x)*(1 - 4*x)*(1 - 5*x)*(1 - 10*x)*(1 - 15*x)). - Colin Barker, Jan 11 2019 EXAMPLE Some solutions for n=5: ..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0 ..0..0..1..0....0..1..1..0....0..0..0..1....0..0..0..1....0..1..0..1 ..0..1..2..0....0..0..1..0....0..0..1..2....0..0..1..0....0..1..0..0 ..0..0..1..0....0..0..0..1....0..0..0..1....0..1..0..1....0..0..1..1 ..0..0..1..0....0..1..1..0....0..1..0..1....0..1..1..1....0..1..1..1 CROSSREFS Column 4 of A268079. Sequence in context: A371407 A369505 A268052 * A202545 A131812 A241259 Adjacent sequences: A268072 A268073 A268074 * A268076 A268077 A268078 KEYWORD nonn AUTHOR R. H. Hardin, Jan 25 2016 STATUS approved

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Last modified July 23 08:23 EDT 2024. Contains 374546 sequences. (Running on oeis4.)