OFFSET
1,3
COMMENTS
Row 1 of A214166.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 10*a(n-1) -30*a(n-2) +20*a(n-3) +31*a(n-4) -30*a(n-5).
Empirical: a(n) = 2^n/9 +3/16 -53*(-1)^n/144 +3^n/16 +5^n/144. - R. J. Mathar, Jul 09 2012
Empirical: G.f.: x*(1 - 9*x + 24*x^2 - 19*x^3) / ((1 - x)*(1 + x)*(1 - 2*x)*(1 - 3*x)*(1 - 5*x)). - Colin Barker, Apr 22 2019
EXAMPLE
Some solutions for n=8
..0..1..0..2..0..1..0..1..2........0..1..0..1..0..1..0..2..3
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 05 2012
STATUS
approved