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

1,2

Comments

Column 3 of A211700

Links

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

Example

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

Crossrefs

Sequence in context: A367691 A307970 A216604 * A261396 A357532 A018148

Adjacent sequences: A211692 A211693 A211694 * A211696 A211697 A211698

Keyword

nonn

Author

R. H. Hardin Apr 19 2012

Status

approved