

A221684


Number of 0..n arrays of length 5 with each element differing from at least one neighbor by 1 or less, starting with 0


1



16, 40, 68, 100, 133, 166, 199, 232, 265, 298, 331, 364, 397, 430, 463, 496, 529, 562, 595, 628, 661, 694, 727, 760, 793, 826, 859, 892, 925, 958, 991, 1024, 1057, 1090, 1123, 1156, 1189, 1222, 1255, 1288, 1321, 1354, 1387, 1420, 1453, 1486, 1519, 1552, 1585
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OFFSET

1,1


COMMENTS

Row 5 of A221683


LINKS

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


FORMULA

Empirical: a(n) = 33*n  32 for n>3


EXAMPLE

Some solutions for n=6
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....0....0....1....1....1....1....1....1....1....1....0....0....0
..2....2....0....1....5....2....4....2....0....6....1....6....2....1....2....5
..5....4....1....5....5....2....4....4....0....6....2....6....1....2....1....6
..6....5....1....4....6....1....4....4....1....5....1....6....2....1....0....6


CROSSREFS

Sequence in context: A176869 A132161 A316562 * A247345 A332519 A177723
Adjacent sequences: A221681 A221682 A221683 * A221685 A221686 A221687


KEYWORD

nonn


AUTHOR

R. H. Hardin Jan 22 2013


STATUS

approved



