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A252141 Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 3 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 3 5 6 or 7 1
1921, 3026, 5090, 8132, 14578, 24855, 44707, 79081, 140896, 248042, 450225, 808657, 1449166, 2601931, 4715098, 8501478, 15355964, 27807534, 50383383, 91201345, 165535742, 300252624, 544823562, 989531463, 1797603881, 3264756294 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A252148

LINKS

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

R. H. Hardin, Empirical recurrence of order 96

FORMULA

Empirical recurrence of order 96 (see link above)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Sequence in context: A282474 A252140 A252148 * A157448 A035768 A107564

Adjacent sequences:  A252138 A252139 A252140 * A252142 A252143 A252144

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 14 2014

STATUS

approved

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Last modified October 15 21:38 EDT 2021. Contains 348034 sequences. (Running on oeis4.)