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A301881 Number of nX5 0..1 arrays with every element equal to 0, 1 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
8, 35, 125, 510, 1961, 7869, 31173, 124795, 497909, 1992271, 7963325, 31857711, 127402805, 509641959, 2038421709, 8153897359, 32614779749, 130460538967, 521837435069, 2087359218591, 8349408257621, 33397695880743, 133590605170989 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A301884.

LINKS

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

FORMULA

Empirical: a(n) = 3*a(n-1) +14*a(n-2) -34*a(n-3) -56*a(n-4) +120*a(n-5) +64*a(n-6) -128*a(n-7) for n>9

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301884.

Sequence in context: A059824 A248882 A292479 * A094616 A318020 A114569

Adjacent sequences:  A301878 A301879 A301880 * A301882 A301883 A301884

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 28 2018

STATUS

approved

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Last modified November 14 17:14 EST 2019. Contains 329126 sequences. (Running on oeis4.)