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A251946
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum prime and every diagonal and antidiagonal sum nonprime
1
2735, 2053, 3572, 8937, 25231, 68456, 177132, 512051, 1394255, 3602453, 10493651, 28493630, 73547094, 215611381, 583411229, 1504465281, 4438290073, 11968260682, 30834025066, 91514007569, 245967352689, 633116564171, 1889972763635
OFFSET
1,1
COMMENTS
Column 4 of A251950
LINKS
FORMULA
Empirical: a(n) = 42*a(n-3) -485*a(n-6) +1193*a(n-9) -6286*a(n-12) +16999*a(n-15) -43581*a(n-18) +70906*a(n-21) -74639*a(n-24) +37823*a(n-27) -54*a(n-30) -1971*a(n-33) +54*a(n-36) for n>39
EXAMPLE
Some solutions for n=4
..1..0..1..1..3..1....0..2..0..0..2..0....0..0..2..0..3..2....1..0..1..1..3..1
..3..2..0..0..2..3....1..3..1..1..0..1....1..1..3..1..1..0....1..3..1..1..0..1
..1..0..1..1..0..1....1..0..1..1..0..1....1..1..0..1..1..0....0..2..0..0..2..0
..1..0..1..1..0..1....0..2..0..0..2..3....0..3..2..0..0..2....1..0..1..1..0..1
..3..2..0..0..2..3....1..0..1..1..0..1....1..1..0..1..1..3....1..0..1..1..0..1
..1..0..1..1..3..3....1..3..1..1..3..1....1..1..3..1..1..0....0..2..0..0..2..0
CROSSREFS
Sequence in context: A015423 A260543 A145647 * A045155 A251989 A251985
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 11 2014
STATUS
approved