A269073 - OEIS

A269073

Number of nX6 binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

41, 489, 7477, 102545, 1383105, 18220241, 236272677, 3024972401, 38333973609, 481701017577, 6010309951205, 74542025956769, 919716929870465, 11296618314880209, 138204770920790229, 1684906034464128193

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OFFSET

1,1

COMMENTS

Column 6 of A269075.

LINKS

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

FORMULA

Empirical: a(n) = 28*a(n-1) -230*a(n-2) +192*a(n-3) +3805*a(n-4) -5776*a(n-5) -27808*a(n-6) +25744*a(n-7) +101333*a(n-8) -13916*a(n-9) -149690*a(n-10) -66848*a(n-11) +23183*a(n-12) +9888*a(n-13) -2304*a(n-14)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A269075.

Sequence in context: A269087 A166843 A098958 * A086949 A177504 A297976

Adjacent sequences: A269070 A269071 A269072 * A269074 A269075 A269076

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 19 2016

STATUS

approved