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A281077
Number of nX5 0..1 arrays with no element equal to more than two of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.
1
0, 92, 894, 3330, 10954, 32244, 89147, 236332, 609693, 1542674, 3849427, 9505656, 23280649, 56635936, 137005695, 329823586, 790661565, 1888351302, 4495083545, 10668575466, 25253243659, 59632117024, 140504745763, 330394273406
OFFSET
1,2
COMMENTS
Column 5 of A281080.
LINKS
FORMULA
Empirical: a(n) = 9*a(n-1) -32*a(n-2) +56*a(n-3) -48*a(n-4) +16*a(n-5) +4*a(n-6) -20*a(n-7) +26*a(n-8) +18*a(n-9) -66*a(n-10) +46*a(n-11) -6*a(n-12) +6*a(n-13) -4*a(n-14) -12*a(n-15) -5*a(n-16) +25*a(n-17) -6*a(n-18) -10*a(n-19) -3*a(n-20) +11*a(n-21) -2*a(n-22) -2*a(n-23) -a(n-24) +a(n-25) for n>32
EXAMPLE
Some solutions for n=4
..0..0..1..1..1. .0..0..1..1..0. .0..0..1..1..0. .0..1..0..0..1
..1..1..0..0..1. .0..1..0..1..1. .1..1..0..1..0. .1..0..1..0..1
..0..0..1..0..0. .1..0..1..0..1. .1..0..1..0..1. .0..1..1..0..1
..1..0..1..1..0. .1..1..0..0..1. .0..1..0..1..0. .0..0..1..0..0
CROSSREFS
Cf. A281080.
Sequence in context: A355622 A231300 A176630 * A207061 A279913 A172449
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 14 2017
STATUS
approved