OFFSET
1,1
COMMENTS
Column 4 of A250432
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 2*a(n-1) +8*a(n-2) -18*a(n-3) -27*a(n-4) +72*a(n-5) +48*a(n-6) -168*a(n-7) -42*a(n-8) +252*a(n-9) -252*a(n-11) +42*a(n-12) +168*a(n-13) -48*a(n-14) -72*a(n-15) +27*a(n-16) +18*a(n-17) -8*a(n-18) -2*a(n-19) +a(n-20)
Empirical for n mod 2 = 0: a(n) = (1/147456)*n^10 + (23/73728)*n^9 + (13/2048)*n^8 + (77/1024)*n^7 + (1763/3072)*n^6 + (4525/1536)*n^5 + (5927/576)*n^4 + (3473/144)*n^3 + (145/4)*n^2 + (63/2)*n + 12
Empirical for n mod 2 = 1: a(n) = (1/147456)*n^10 + (23/73728)*n^9 + (941/147456)*n^8 + (1409/18432)*n^7 + (43777/73728)*n^6 + (115189/36864)*n^5 + (831857/73728)*n^4 + (169595/6144)*n^3 + (717525/16384)*n^2 + (333375/8192)*n + (275625/16384).
a(n+1)=A202095(n). - R. J. Mathar, Dec 04 2014
EXAMPLE
Some solutions for n=6
..0..0..0..1..0....0..0..0..0..0....0..0..0..0..0....0..0..0..0..0
..0..0..0..0..1....0..0..0..1..0....0..1..0..1..1....0..0..0..1..1
..0..0..1..1..1....0..0..0..1..0....0..0..0..0..0....0..0..1..0..1
..0..1..0..1..1....0..0..0..1..1....1..1..1..1..1....0..1..0..1..1
..1..0..1..1..1....0..1..0..1..1....0..0..1..0..1....1..0..1..0..1
..1..1..1..1..1....0..0..0..1..1....1..1..1..1..1....0..1..1..1..1
..1..1..1..1..1....0..1..0..1..1....0..0..1..1..1....1..0..1..1..1
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 22 2014
STATUS
approved