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A299011
Number of nX4 0..1 arrays with every element equal to 0, 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero.
1
8, 29, 44, 174, 1052, 4488, 18758, 89713, 409166, 1788003, 8121661, 37033578, 165692402, 746131075, 3379582490, 15225588917, 68575462952, 309641196485, 1396795549454, 6296528560960, 28404446913096, 128136379596690
OFFSET
1,1
COMMENTS
Column 4 of A299015.
FORMULA
Empirical recurrence of order 66 (see link above)
EXAMPLE
Some solutions for n=5
..0..0..1..1. .0..1..1..0. .0..0..1..0. .0..0..0..1. .0..1..0..0
..1..1..0..0. .1..0..0..1. .1..1..1..0. .1..0..0..0. .0..0..1..1
..0..0..0..1. .1..0..0..1. .1..0..1..1. .1..1..1..1. .0..0..0..0
..1..0..0..0. .0..1..1..0. .1..1..0..0. .1..1..0..1. .1..0..1..0
..1..0..1..1. .1..1..1..1. .0..0..1..0. .0..1..0..0. .1..0..1..1
CROSSREFS
Cf. A299015.
Sequence in context: A299875 A035339 A034167 * A299802 A299678 A300310
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 31 2018
STATUS
approved