OFFSET
1,3
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-3) + 2*a(n-4) + a(n-5).
Empirical g.f.: x^2*(1 + x)^2 / (1 - x^3 - 2*x^4 - x^5). - Colin Barker, Jan 08 2019
EXAMPLE
All solutions for n=4:
..1..5
..3..0
..8..2
..7..4
..9..6
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 19 2015
STATUS
approved