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A281711 Number of nX4 0..1 arrays with no element unequal to a strict majority of its horizontal, diagonal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 1
2, 14, 38, 97, 245, 631, 1625, 4234, 11017, 28652, 74521, 193836, 504195, 1311543, 3411786, 8875377, 23088294, 60062126, 156247057, 406466099, 1057396975, 2750760479, 7155964344, 18615901819, 48428431650, 125984478749, 327743372244 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A281715.
LINKS
FORMULA
Empirical: a(n) = 4*a(n-1) -2*a(n-2) -4*a(n-3) -2*a(n-4) +a(n-5) +7*a(n-6) +a(n-7) -10*a(n-8) -a(n-9) +27*a(n-10) -8*a(n-11) -18*a(n-12) +8*a(n-13) +a(n-14) -3*a(n-15) for n>16
EXAMPLE
Some solutions for n=4
..0..0..1..1. .0..0..1..1. .0..0..1..0. .0..0..1..1. .0..0..0..1
..0..0..1..1. .0..1..1..1. .0..1..0..1. .0..1..1..1. .0..0..1..0
..0..1..0..1. .0..0..1..1. .1..0..1..0. .0..0..1..1. .0..1..0..1
..1..0..1..0. .0..0..1..1. .0..1..0..1. .0..0..0..0. .1..0..1..0
CROSSREFS
Cf. A281715.
Sequence in context: A067293 A009368 A092344 * A216528 A329735 A290124
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 28 2017
STATUS
approved

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Last modified March 3 10:27 EST 2024. Contains 370510 sequences. (Running on oeis4.)