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A301322 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. 1
64, 1063, 1844, 3996, 8035, 15802, 31172, 62375, 126931, 262036, 546825, 1149471, 2427928, 5143628, 10917376, 23198890, 49332845, 104956579, 223369135, 475481242, 1012314623, 2155517305, 4590185451, 9775585602, 20820114408 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A301323.

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) -7*a(n-2) -a(n-3) +10*a(n-4) -14*a(n-5) +17*a(n-6) -13*a(n-7) +10*a(n-8) -6*a(n-9) -5*a(n-10) +7*a(n-11) -2*a(n-12) -2*a(n-13) +5*a(n-14) -7*a(n-15) +4*a(n-16) -2*a(n-17) +2*a(n-18) +2*a(n-20) -2*a(n-21) +a(n-22) -a(n-23) for n>28

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

Cf. A301323.

Sequence in context: A223018 A221247 A280603 * A300497 A300936 A300880

Adjacent sequences:  A301319 A301320 A301321 * A301323 A301324 A301325

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 18 2018

STATUS

approved

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Last modified September 19 21:42 EDT 2020. Contains 337184 sequences. (Running on oeis4.)