A211830 - OEIS

A211830

Number of nonnegative integer arrays of length n+3 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value 3

1, 11, 77, 461, 2621, 14862, 86295, 520534, 3285279, 21751723, 151075466, 1099127680, 8359344687, 66315597630, 547588531486, 4697070887568, 41777761715433, 384670982322915, 3661036657532939, 35965773063598059

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OFFSET

1,2

COMMENTS

Column 2 of A211836

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

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....0....1....1....1....1....1....1....1....1....1....1....1....1

..2....2....2....1....2....2....0....2....0....2....2....2....2....2....2....2