A219980 - OEIS

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A219980

Unmatched value maps: number of nX3 binary arrays indicating the locations of corresponding elements not equal to any horizontal, vertical or antidiagonal neighbor in a random 0..3 nX3 array

4, 42, 316, 2344, 17591, 131978, 989813, 7423785, 55680172, 417613528, 3132193649, 23492146292, 176196298209, 1321511242101, 9911626877788, 74339395862026, 557561926512940, 4181837884123208, 31364709922866499, 235242268065930378

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 3 of A219985

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..82

FORMULA

Empirical: a(n) = 8*a(n-1) -7*a(n-2) +27*a(n-3) -23*a(n-4) +28*a(n-5) -18*a(n-6) -5*a(n-7) +10*a(n-8) -a(n-9) -3*a(n-10) +a(n-11)

EXAMPLE

Some solutions for n=3

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