A211696 Number of nonnegative integer arrays of length n+2*4-2 with new values introduced in order 0 upwards and every value appearing only in runs of at least 4.

1, 2, 3, 4, 5, 8, 13, 20, 29, 45, 73, 118, 185, 294, 480, 793, 1298, 2127, 3531, 5932, 9975, 16783, 28415, 48527, 83236, 143064, 246839, 428430, 747193, 1307145, 2294023, 4043525, 7158170, 12715501, 22656789, 40512977, 72713331, 130948115, 236535554

Offset

1,2

Comments

Column 4 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....0....0....0....1
..1....0....0....0....1
..1....0....1....0....1
..1....1....1....0....1
..1....1....1....0....1
..1....1....1....0....1
..1....1....1....0....1

Crossrefs

Cf. A211700.

Sequence in context: A367692 A307971 A346073 * A357533 A152526 A330706

Adjacent sequences: A211693 A211694 A211695 * A211697 A211698 A211699

Keyword

nonn

Author

R. H. Hardin, Apr 19 2012

Status

approved