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A298391 Number of nX3 0..1 arrays with every element equal to 1, 2, 4, 5 or 6 king-move adjacent elements, with upper left element zero. 1
1, 7, 15, 29, 63, 167, 473, 1205, 3161, 8399, 22021, 58279, 153851, 405489, 1070981, 2826361, 7458763, 19688757, 51962947, 137149575, 361994337, 955427345, 2521739769, 6655820967, 17567183369, 46366440203, 122378424487, 323002621161 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Column 3 of A298396.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 4*a(n-1) -3*a(n-2) +a(n-3) -11*a(n-4) +12*a(n-5) -4*a(n-6) +19*a(n-8) -20*a(n-9) +29*a(n-10) -65*a(n-11) +63*a(n-12) -34*a(n-13) +10*a(n-15) for n>17

EXAMPLE

Some solutions for n=5

..0..1..0. .0..1..1. .0..0..1. .0..1..1. .0..1..1. .0..1..0. .0..1..1

..1..0..0. .0..0..0. .0..1..1. .0..0..1. .0..0..0. .1..0..0. .0..1..0

..1..0..0. .0..0..1. .1..1..1. .1..1..1. .0..0..1. .0..0..0. .1..0..1

..0..0..0. .0..0..1. .1..1..0. .1..0..0. .1..0..1. .1..1..0. .0..1..0

..1..1..0. .0..1..0. .1..0..1. .1..1..0. .0..1..0. .1..0..0. .0..1..1

CROSSREFS

Cf. A298396.

Sequence in context: A302125 A006188 A198589 * A299509 A299309 A300110

Adjacent sequences:  A298388 A298389 A298390 * A298392 A298393 A298394

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 18 2018

STATUS

approved

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Last modified August 12 04:52 EDT 2022. Contains 356067 sequences. (Running on oeis4.)