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A252842 Number of (n+2)X(2+2) 0..3 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order 1
15395, 510488, 17431462, 598576435, 20541757032, 705111416679, 24203999575311, 830842687080423, 28520017219603855, 978996631680111286, 33605667415789875388, 1153569817068272958639, 39598180839349444564715 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A252844

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..120

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A345562 A345817 A252990 * A261724 A031637 A054838

Adjacent sequences:  A252839 A252840 A252841 * A252843 A252844 A252845

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 22 2014

STATUS

approved

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Last modified January 20 01:18 EST 2022. Contains 350467 sequences. (Running on oeis4.)