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A301788 Number of nX6 0..1 arrays with every element equal to 0 or 1 horizontally or antidiagonally adjacent elements, with upper left element zero. 1
13, 22, 38, 66, 116, 205, 364, 648, 1156, 2065, 3692, 6605, 11821, 21162, 37891, 67853, 121517, 217635, 389795, 698159, 1250488, 2239801, 4011830, 7185843, 12871061, 23054299, 41294302, 73965426, 132485296, 237304945, 425055875, 761351738 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A301790.

LINKS

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

FORMULA

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

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301790.

Sequence in context: A164493 A164445 A164418 * A164409 A301962 A298235

Adjacent sequences:  A301785 A301786 A301787 * A301789 A301790 A301791

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 26 2018

STATUS

approved

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Last modified May 28 21:37 EDT 2020. Contains 334690 sequences. (Running on oeis4.)