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A258542
Number of (n+2)X(5+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum
1
25056, 81796, 142544, 367236, 726880, 1784896, 3826716, 9302500, 21443688, 53027524, 129029424, 325730304, 820227456, 2103323044, 5399925160, 13983062500, 36263854752, 94418540176, 246096476872, 642572179236
OFFSET
1,1
COMMENTS
Column 5 of A258545
LINKS
FORMULA
Empirical: a(n) = 3*a(n-1) +13*a(n-2) -42*a(n-3) -71*a(n-4) +255*a(n-5) +210*a(n-6) -885*a(n-7) -355*a(n-8) +1950*a(n-9) +305*a(n-10) -2865*a(n-11) +2865*a(n-13) -305*a(n-14) -1950*a(n-15) +355*a(n-16) +885*a(n-17) -210*a(n-18) -255*a(n-19) +71*a(n-20) +42*a(n-21) -13*a(n-22) -3*a(n-23) +a(n-24) for n>27
EXAMPLE
Some solutions for n=3
..0..1..0..1..0..0..0....1..1..0..1..0..0..0....1..1..0..1..0..0..1
..1..1..0..1..0..1..0....1..1..1..1..1..0..0....1..1..1..1..1..0..1
..0..1..0..1..0..1..0....0..0..0..0..0..0..1....1..0..0..0..0..0..1
..1..0..0..1..0..1..1....0..0..1..1..1..0..1....0..1..1..1..1..0..1
..0..1..0..1..0..1..1....0..0..0..1..0..1..1....1..0..0..0..0..1..1
CROSSREFS
Sequence in context: A263815 A125268 A212726 * A205041 A252614 A253530
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jun 02 2015
STATUS
approved