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A283540 Number of nX5 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors. 1
24, 201, 2369, 25532, 282773, 3109801, 34266804, 377393657, 4156954825, 45786939720, 504326714089, 5554965623073, 61185851789928, 673938982059417, 7423182833328281, 81763548900367844, 900594542105052837 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A283543.
LINKS
FORMULA
Empirical: a(n) = 13*a(n-1) -15*a(n-2) -129*a(n-3) +568*a(n-4) +430*a(n-5) -2325*a(n-6) -175*a(n-7) -2127*a(n-8) +3919*a(n-9) +438*a(n-10) -262*a(n-11) -1743*a(n-12) +309*a(n-13) +1745*a(n-14) -463*a(n-15) -462*a(n-16) +152*a(n-17) +53*a(n-18) -19*a(n-19) -3*a(n-20) +a(n-21)
EXAMPLE
Some solutions for n=4
..1..0..0..0..1. .0..1..0..0..1. .0..1..0..1..0. .0..0..0..0..1
..0..0..1..0..1. .0..1..0..0..1. .0..1..0..1..0. .0..1..0..0..1
..0..0..1..0..1. .0..1..0..0..1. .0..0..0..0..0. .0..0..0..0..1
..0..1..0..0..0. .0..1..0..0..0. .0..1..0..0..0. .0..0..1..0..1
CROSSREFS
Cf. A283543.
Sequence in context: A223748 A269691 A282644 * A047659 A108671 A097321
KEYWORD
nonn
AUTHOR
R. H. Hardin, Mar 10 2017
STATUS
approved

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Last modified May 26 05:37 EDT 2024. Contains 372807 sequences. (Running on oeis4.)