A210157 Number of (n+1)X(n+1) 0..3 arrays with every 2X2 subblock having two or three distinct values, and new values 0..3 introduced in row major order

13, 6977, 63734680, 7497695247894, 11230410246683136735, 214160856104080731185022846, 51994930493116642866385994032327421, 160715719061735613747680039160868439624176414

Offset

1,1

Comments

Diagonal of A210165

Links

Table of n, a(n) for n=1..8.

Example

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

Crossrefs

Sequence in context: A298273 A203585 A191937 * A213410 A013524 A060887

Adjacent sequences: A210154 A210155 A210156 * A210158 A210159 A210160

Keyword

nonn

Author

R. H. Hardin Mar 18 2012

Status

approved