A252471 - OEIS

A252471

Number of (n+2)X(6+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 3 5 6 or 8

8624, 9056, 62391, 409090, 2670237, 17562191, 115183323, 755607698, 4967204849, 32613906966, 214022771622, 1405186467829, 9227158423671, 60580408167661, 397722666715044, 2611240940819539, 17144272724693674, 112560751779945208

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 6 of A252473

LINKS

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

R. H. Hardin, Empirical recurrence of order 72

FORMULA

Empirical recurrence of order 72 (see link above)

EXAMPLE

Some solutions for n=3

..3..3..1..3..3..3..3..3....3..3..1..3..3..3..1..3....1..3..3..3..3..1..3..3

..1..3..3..3..3..3..3..3....1..3..3..3..3..3..3..3....3..3..1..3..3..3..3..1

..3..3..3..1..3..3..3..3....3..3..3..3..3..3..3..3....3..3..3..3..3..3..3..3

..3..3..3..3..3..1..3..3....3..3..3..1..3..3..3..3....3..3..3..1..3..3..1..3

..3..3..1..3..3..3..3..3....3..3..3..3..3..3..3..1....3..1..3..3..3..3..3..3

CROSSREFS

Sequence in context: A370970 A116326 A031809 * A250589 A190467 A057658

Adjacent sequences: A252468 A252469 A252470 * A252472 A252473 A252474

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2014

STATUS

approved