A199034 Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and every element equal to one or two horizontal or vertical neighbors.

0, 0, 0, 0, 0, 1, 3, 3, 1, 6, 15, 15, 75, 126, 71, 397, 786, 550, 3043, 5730, 3660, 20610, 39843, 26407, 149468, 288070, 188649, 1074387, 2082753, 1372608, 7852896, 15252825, 10045040, 57692788, 112347998, 74107005, 427035846, 833163180

Offset

1,7

Comments

Column 1 of A199041

Links

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

Example

All solutions for n=7
..0....0....0
..0....0....0
..1....1....0
..1....1....1
..2....1....1
..2....2....2
..2....2....2

Crossrefs

Sequence in context: A001498 A240439 A243211 * A138464 A117279 A234251

Adjacent sequences: A199031 A199032 A199033 * A199035 A199036 A199037

Keyword

nonn

Author

R. H. Hardin, Nov 02 2011

Status

approved