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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 0
13, 6977, 63734680, 7497695247894, 11230410246683136735, 214160856104080731185022846, 51994930493116642866385994032327421, 160715719061735613747680039160868439624176414 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 11 10:16 EDT 2021. Contains 343788 sequences. (Running on oeis4.)