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A280602 Number of nX6 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 1
32, 383, 735, 1709, 3647, 7594, 15792, 33136, 70293, 150510, 324417, 702417, 1525112, 3317003, 7221478, 15731170, 34280316, 74716385, 162869145, 355053222, 774048105, 1687544757, 3679181777, 8021454376, 17488766688, 38130129481 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A280604.
LINKS
FORMULA
Empirical: a(n) = 5*a(n-1) -8*a(n-2) +4*a(n-3) +2*a(n-7) -2*a(n-8) -3*a(n-9) +5*a(n-10) -a(n-11) -a(n-12) -a(n-14) +a(n-15) for n>19
EXAMPLE
Some solutions for n=4
..0..1..1..0..1..0. .0..0..1..1..0..1. .0..1..1..0..1..0. .0..0..1..1..0..1
..1..0..1..0..1..0. .0..1..0..1..0..1. .1..0..1..0..1..0. .0..1..0..1..0..1
..1..0..1..0..1..0. .1..0..0..1..0..1. .1..0..1..0..1..0. .1..0..1..0..1..0
..1..0..0..1..0..1. .1..1..1..0..1..0. .1..0..1..0..1..1. .1..1..0..1..0..0
CROSSREFS
Cf. A280604.
Sequence in context: A125420 A163690 A268999 * A301321 A300496 A300935
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 2017
STATUS
approved

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Last modified April 15 17:52 EDT 2024. Contains 371693 sequences. (Running on oeis4.)