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A252905 Number of (n+2)X(1+2) 0..3 arrays with every consecutive three elements in every row and column having exactly 2 distinct values, in every diagonal 1 or 2 distinct values, in every antidiagonal 2 or 3 distinct values, and new values 0 upwards introduced in row major order 1
238, 1125, 5567, 28642, 148002, 771768, 4034881, 21118867, 110669161, 580192543, 3042199896, 15954252572, 83676184647, 438866555650, 2301856594765, 12073355842878, 63325661038166, 332149215192824, 1742159173884376 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A252910

LINKS

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

R. H. Hardin, Empirical recurrence of order 63

FORMULA

Empirical recurrence of order 63 (see link above)

EXAMPLE

Some solutions for n=2

..0..0..1....0..1..0....0..0..1....0..1..1....0..1..0....0..1..1....0..1..1

..0..2..2....0..2..2....2..2..1....2..2..1....0..1..1....1..0..1....0..1..1

..2..0..2....3..2..2....2..0..2....2..1..2....1..0..1....0..1..0....2..0..0

..0..0..3....0..1..0....3..2..2....0..2..2....0..0..2....0..1..1....2..0..0

CROSSREFS

Sequence in context: A124169 A264885 A252910 * A122266 A286213 A251404

Adjacent sequences:  A252902 A252903 A252904 * A252906 A252907 A252908

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 24 2014

STATUS

approved

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Last modified September 16 23:53 EDT 2021. Contains 347477 sequences. (Running on oeis4.)