A274066 Number of nX2 0..2 arrays with no three equal values forming an isosceles triangle, and new values introduced in 0..2 order.

2, 9, 50, 285, 1129, 4791, 17219, 63640, 182143, 598332, 1622713, 4807733, 12097755, 34041279, 81727927, 221397591, 519077550, 1343959858, 3089610203, 7776466084, 17320256047, 42922087359, 94826300116, 228462204560

Offset

1,1

Comments

Column 2 of A274068.

Links

Table of n, a(n) for n=1..24.

Example

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

Crossrefs

Cf. A274068.

Sequence in context: A262752 A138416 A328741 * A055997 A115599 A047069

Adjacent sequences: A274063 A274064 A274065 * A274067 A274068 A274069

Keyword

nonn

Author

R. H. Hardin, Jun 09 2016

Status

approved