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A279711
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Number of 4Xn 0..1 arrays with no element equal to a strict majority of its horizontal and antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.
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1
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8, 13, 42, 125, 385, 1195, 3751, 11823, 37385, 118390, 375114, 1188640, 3766483, 11934903, 37818803, 119840838, 379760607, 1203429425, 3813594984, 12085090793, 38297085876, 121361690893, 384589567332, 1218746480798, 3862151137416
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OFFSET
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1,1
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COMMENTS
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Row 4 of A279709.
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LINKS
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R. H. Hardin, Table of n, a(n) for n = 1..210
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FORMULA
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Empirical: a(n) = 8*a(n-1) -24*a(n-2) +31*a(n-3) +2*a(n-4) -66*a(n-5) +96*a(n-6) -50*a(n-7) -14*a(n-8) -18*a(n-9) +77*a(n-10) +32*a(n-11) -243*a(n-12) +257*a(n-13) +22*a(n-14) -117*a(n-15) +3*a(n-16) -28*a(n-17) +17*a(n-18) +7*a(n-19) +5*a(n-20) +3*a(n-21) +a(n-23) for n>25
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EXAMPLE
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Some solutions for n=4
..0..1..0..0. .0..1..1..0. .0..1..0..1. .0..1..0..1. .0..1..0..1
..0..1..1..0. .0..0..1..0. .0..1..1..0. .0..1..0..1. .0..1..0..0
..0..0..1..1. .1..0..0..1. .0..0..0..1. .1..0..0..1. .0..1..1..0
..1..0..0..1. .0..1..0..1. .1..1..0..1. .1..1..0..1. .1..0..1..0
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CROSSREFS
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Cf. A279709.
Sequence in context: A039298 A360790 A218627 * A043121 A043901 A359553
Adjacent sequences: A279708 A279709 A279710 * A279712 A279713 A279714
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin, Dec 17 2016
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STATUS
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approved
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