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A298189 Number of nX2 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero. 8
2, 8, 26, 88, 298, 1012, 3440, 11700, 39804, 135432, 460832, 1568112, 5336024, 18157728, 61788368, 210258064, 715482384, 2434699680, 8284988960, 28192819392, 95936772448, 326461301312, 1110908566656, 3780288336704, 12863866903872 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A298195.

LINKS

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

FORMULA

Empirical: a(n) = 4*a(n-1) -2*a(n-2) +2*a(n-3) -6*a(n-4) -4*a(n-5)

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

Cf. A298195.

Sequence in context: A230904 A289595 A343485 * A053956 A320802 A052543

Adjacent sequences: A298186 A298187 A298188 * A298190 A298191 A298192

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 14 2018

STATUS

approved

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Last modified February 4 05:49 EST 2023. Contains 360046 sequences. (Running on oeis4.)