A211695 Number of nonnegative integer arrays of length n+2*3-2 with new values introduced in order 0 upwards and every value appearing only in runs of at least 3.

1, 2, 3, 4, 7, 12, 19, 33, 59, 102, 182, 334, 608, 1121, 2109, 3979, 7564, 14581, 28292, 55245, 108972, 216521, 432839, 872163, 1769716, 3612292, 7422748, 15351002, 31928839, 66803627, 140592917, 297492390, 632896835, 1353709480, 2910262905

Offset: 1

Author

R. H. Hardin Apr 19 2012

Keywords

• nonn

Comments

Column 3 of A211700

Examples

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

Links

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