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A251901
Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum unequal to 4 or 5 and every diagonal and antidiagonal sum equal to 4 or 5
1
5264, 1962, 2772, 4208, 10266, 17976, 28288, 66216, 121684, 210948, 502782, 957268, 1775466, 4040932, 8403774, 16389916, 36469244, 76274736, 161027262, 348138252, 747214432, 1575745364, 3498942344, 7430457700, 16117264814, 34861132976
OFFSET
1,1
COMMENTS
Column 4 of A251905
LINKS
FORMULA
Empirical: a(n) = 3*a(n-2) +5*a(n-3) +22*a(n-4) -15*a(n-5) -41*a(n-6) -110*a(n-7) -150*a(n-8) +207*a(n-9) +98*a(n-10) +744*a(n-11) +359*a(n-12) -534*a(n-13) +19*a(n-14) -1709*a(n-15) -478*a(n-16) +193*a(n-17) -365*a(n-18) +2106*a(n-19) +554*a(n-20) +1279*a(n-21) +380*a(n-22) -2232*a(n-23) -370*a(n-24) -1512*a(n-25) -32*a(n-26) +1488*a(n-27) +16*a(n-28) +128*a(n-29) +16*a(n-30) -64*a(n-31) -64*a(n-33) for n>37
EXAMPLE
Some solutions for n=4
..1..3..3..0..0..2....0..0..2..1..3..3....2..0..0..3..3..1....2..0..1..0..1..0
..1..0..2..1..3..3....1..3..3..0..0..2....3..3..2..1..0..0....3..0..3..0..3..0
..1..3..3..0..0..2....0..0..2..1..3..3....1..0..0..3..3..1....3..1..3..2..3..1
..0..0..1..2..3..3....2..3..3..0..0..2....3..3..1..2..0..0....0..2..0..1..0..2
..2..3..3..0..0..2....0..0..2..1..3..3....2..0..0..3..3..2....0..3..0..3..0..3
..0..0..2..1..3..2....1..3..3..0..0..1....3..3..2..1..0..0....1..3..2..2..2..3
CROSSREFS
Sequence in context: A234229 A143936 A204281 * A274361 A223494 A265985
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2014
STATUS
approved