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A211847
Number of nonnegative integer arrays of length n+13 with new values 0 upwards introduced in order, no three adjacent elements all unequal, and containing the value 7.
1
1, 15, 149, 1173, 7996, 49210, 280751, 1510267, 7752966, 38313584, 183476493, 855810005, 3904023943, 17474944971, 76959615336, 334220597220, 1434013918092, 6088757186340, 25619291046722, 106954200571650, 443491592171780
OFFSET
1,2
COMMENTS
Column 6 of A211849.
LINKS
EXAMPLE
Some solutions for n=3
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....1....1....1....1....1....1....0....1....0....1....1....1....1
..1....1....1....1....1....1....1....0....1....1....0....1....1....1....0....1
..2....1....2....2....2....2....2....0....2....1....0....1....2....2....0....2
..2....2....2....2....2....2....2....2....2....1....2....2....2....2....2....2
..3....2....3....3....3....3....3....2....3....2....2....2....3....3....2....3
..2....3....3....3....3....3....3....3....3....2....2....3....3....2....3....3
..3....3....4....4....3....3....4....3....4....3....3....3....4....2....3....4
..3....4....4....4....4....3....4....4....4....3....3....4....4....4....4....3
..4....4....5....4....4....4....1....4....4....4....4....4....5....4....4....4
..4....5....5....5....5....4....1....4....5....4....4....4....4....5....5....4
..5....5....3....5....5....5....5....5....5....5....5....5....4....5....5....5
..5....5....3....5....6....5....5....5....6....5....5....5....6....6....6....5
..6....6....6....6....6....6....6....6....6....6....6....6....6....5....6....6
..6....6....6....6....6....6....6....6....6....6....6....6....7....5....7....6
..7....7....7....7....7....7....7....7....7....7....7....7....6....7....6....7
CROSSREFS
Cf. A211849.
Sequence in context: A069417 A051272 A021414 * A055431 A119998 A119511
KEYWORD
nonn
AUTHOR
R. H. Hardin Apr 22 2012
STATUS
approved