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A279576 Number of nX4 0..2 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 1
4, 304, 20776, 1356120, 86246944, 5385546376, 331573929104, 20185283466808, 1217559111188832, 72881432768564104, 4334414771180477232, 256350873834571829720, 15088730814780904713600, 884394788795879442352680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A279580.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..182

FORMULA

Empirical: a(n) = 130*a(n-1) -5401*a(n-2) +81048*a(n-3) -655576*a(n-4) +3394056*a(n-5) -12310816*a(n-6) +32887040*a(n-7) -66357008*a(n-8) +101980416*a(n-9) -118737920*a(n-10) +102678528*a(n-11) -63588352*a(n-12) +26722304*a(n-13) -7077888*a(n-14) +1048576*a(n-15) -65536*a(n-16) for n>17

EXAMPLE

Some solutions for n=3

..0..1..2..1. .0..1..2..1. .0..0..1..0. .0..1..2..0. .0..1..2..1

..2..2..2..2. .2..0..0..2. .2..0..1..1. .0..2..1..2. .1..0..2..1

..2..0..1..2. .1..1..1..0. .0..2..0..1. .1..1..1..0. .0..1..1..0

CROSSREFS

Cf. A279580.

Sequence in context: A343147 A128904 A001537 * A201979 A280792 A027512

Adjacent sequences:  A279573 A279574 A279575 * A279577 A279578 A279579

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 15 2016

STATUS

approved

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Last modified December 5 09:34 EST 2021. Contains 349543 sequences. (Running on oeis4.)