A273967 Number of nX4 0..3 arrays with no three equal values forming an isosceles triangle, and new values introduced in 0..3 order.

15, 1264, 24587, 49534, 36817, 40569, 36570, 90627, 89429, 182457, 100921, 179282, 121279, 301658, 206783, 445549, 325633, 652935, 526099, 1011751, 897383, 1627068, 1524277, 2600188, 2533039, 4097718, 4108747, 6343186, 6487741, 9626296, 9987409

Offset

1,1

Comments

Column 4 of A273968.

Links

R. H. Hardin, Table of n, a(n) for n = 1..60

Example

Some solutions for n=4
..0..1..1..2. .0..0..1..2. .0..1..1..2. .0..0..1..2. .0..0..1..1
..3..3..2..3. .1..1..0..0. .0..3..3..2. .3..2..1..2. .2..3..3..3
..0..1..2..0. .3..3..3..2. .3..1..1..2. .2..3..1..3. .1..1..0..0
..3..1..2..0. .0..2..2..1. .2..0..0..0. .0..0..1..3. .3..0..1..2

Crossrefs

Cf. A273968.

Sequence in context: A120296 A209679 A135810 * A273963 A220179 A373858

Adjacent sequences: A273964 A273965 A273966 * A273968 A273969 A273970

Keyword

nonn

Author

R. H. Hardin, Jun 05 2016

Status

approved