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A303959 Number of nX6 0..1 arrays with every element unequal to 0, 1, 2 or 5 king-move adjacent elements, with upper left element zero. 1
32, 45, 119, 452, 1431, 4645, 14067, 44800, 144844, 468709, 1496959, 4796728, 15414618, 49584010, 159199225, 511105361, 1641588159, 5273933184, 16939978307, 54407120334, 174750169449, 561310287495, 1802939380101, 5790967286209 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 6 of A303961.
LINKS
FORMULA
Empirical: a(n) = 2*a(n-1) +4*a(n-2) -4*a(n-3) +29*a(n-4) -23*a(n-5) -117*a(n-6) +69*a(n-7) -146*a(n-8) -43*a(n-9) +837*a(n-10) -263*a(n-11) -495*a(n-12) +796*a(n-13) -726*a(n-14) -281*a(n-15) +713*a(n-16) -607*a(n-17) +276*a(n-18) +37*a(n-19) -367*a(n-20) +479*a(n-21) -247*a(n-22) -63*a(n-23) +259*a(n-24) -142*a(n-25) +3*a(n-26) +36*a(n-27) -33*a(n-28) +10*a(n-29) +2*a(n-30) -3*a(n-31) +a(n-32) for n>38
EXAMPLE
Some solutions for n=5
..0..0..0..0..0..0. .0..0..0..1..0..0. .0..0..0..1..0..0. .0..0..0..0..0..0
..1..0..0..0..0..0. .1..0..0..0..0..0. .1..0..0..0..0..0. .0..0..0..0..0..0
..0..0..0..0..1..1. .0..0..0..0..0..0. .0..0..0..0..0..0. .0..0..0..0..1..1
..0..0..0..0..1..1. .0..0..0..0..1..1. .1..0..0..0..0..0. .0..0..0..0..1..1
..0..0..0..0..0..0. .0..1..0..0..1..1. .0..0..0..1..0..0. .0..1..0..0..0..0
CROSSREFS
Cf. A303961.
Sequence in context: A236324 A211813 A353234 * A304602 A305338 A316418
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 03 2018
STATUS
approved

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Last modified June 21 05:50 EDT 2024. Contains 373540 sequences. (Running on oeis4.)