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A279488 Number of nX2 0..1 arrays with no element equal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 1
1, 0, 5, 18, 68, 235, 801, 2678, 8777, 28343, 90455, 285812, 895302, 2783602, 8598096, 26404831, 80671908, 245328807, 742945582, 2241375512, 6738536925, 20194613731, 60344058090, 179828931783, 534560389757, 1585341579329, 4691443265544 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Column 2 of A279494.

LINKS

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

FORMULA

Empirical: a(n) = 7*a(n-1) -15*a(n-2) +11*a(n-3) -8*a(n-4) -9*a(n-5) +34*a(n-6) +17*a(n-7) +30*a(n-8) +41*a(n-9) +a(n-10) -18*a(n-11) -24*a(n-12) -33*a(n-13) -24*a(n-14) -8*a(n-15) -a(n-16)

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A279494.

Sequence in context: A318062 A158879 A322497 * A199843 A109438 A164051

Adjacent sequences:  A279485 A279486 A279487 * A279489 A279490 A279491

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 13 2016

STATUS

approved

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Last modified May 6 01:51 EDT 2021. Contains 343579 sequences. (Running on oeis4.)