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A302148 Number of nX6 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
1, 6, 34, 255, 2005, 15999, 128319, 1030709, 8283143, 66576711, 535145269, 4301582207, 34576983087, 277937230517, 2234120533079, 17958355078007, 144353239501301, 1160343364887311, 9327097456058015, 74973279259758837 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Column 6 of A302150.
LINKS
FORMULA
Empirical: a(n) = 13*a(n-1) -44*a(n-2) +25*a(n-3) +71*a(n-4) -44*a(n-5) -36*a(n-6) +16*a(n-7) for n>9
EXAMPLE
Some solutions for n=5
..0..1..1..0..1..1. .0..1..1..0..0..0. .0..1..1..0..1..1. .0..1..0..1..1..0
..1..1..1..1..1..1. .1..1..0..0..0..0. .1..1..1..1..1..1. .0..1..1..1..1..0
..1..1..0..1..1..1. .0..1..1..1..0..0. .0..1..0..1..1..0. .1..1..1..1..1..1
..1..1..1..1..1..0. .1..1..1..1..0..0. .1..1..0..1..1..1. .1..1..0..1..1..1
..1..1..1..0..1..0. .0..1..1..0..0..1. .1..1..1..1..1..0. .0..1..0..1..1..0
CROSSREFS
Cf. A302150.
Sequence in context: A267242 A197436 A334787 * A218685 A108432 A355887
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 02 2018
STATUS
approved

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)