

A211584


Number of 2..2 arrays x(i) of n+1 elements i=1..n+1 with set{t,u,v in 0,1}((x[i+t]+x[j+u]+x[k+v])*(1)^(t+u+v)) having four, five, six or seven distinct values for every i,j,k<=n


1



16, 48, 128, 302, 704, 1622, 3696, 8626, 19784, 47062, 109280, 264218, 620192, 1517126, 3588888, 8847682, 21038192, 52125406, 124356752, 309096434, 738979400, 1840516550, 4406202720, 10988503498, 26329344800, 65717431510, 157552717784
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

1,1


LINKS

R. H. Hardin, Table of n, a(n) for n = 1..37


FORMULA

Empirical: a(n) = 3*a(n1) +10*a(n2) 35*a(n3) 25*a(n4) +130*a(n5) 180*a(n7) +36*a(n8) +72*a(n9)


EXAMPLE

Some solutions for n=5
..2....2....0...1...2....0....0....0...2...2...1....0...1....0...2...2
..0...1....2....0....1...2....2....1....1....0....2...1....0...2...1....1
..1...2...1....1...2....0....1....0....2...1...1....0....1....1...2...2
..2...1....2....2....1...1....0....2...1....0...2...1....2...2...1...1
..1....2....0...1....0....0....1....0...2...1....1....0...1....0....2....0
..0....1....1....0....1...1....2....2....1....0...2...2...2...1...1....1


CROSSREFS

Sequence in context: A190112 A211576 A211590 * A211598 A235541 A109098
Adjacent sequences: A211581 A211582 A211583 * A211585 A211586 A211587


KEYWORD

nonn


AUTHOR

R. H. Hardin Apr 16 2012


STATUS

approved



