OFFSET
1,2
COMMENTS
Row 2 of A264285.
LINKS
R. H. Hardin, Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = a(n-1) +4*a(n-2) +10*a(n-3) +12*a(n-4) +8*a(n-5) for n>7.
Empirical g.f.: x*(1 + x)*(1 + 8*x + 10*x^2 + 10*x^3 + 8*x^4 + 4*x^5) / (1 - x - 4*x^2 - 10*x^3 - 12*x^4 - 8*x^5). - Colin Barker, Oct 28 2017
EXAMPLE
Some solutions for n=4
..7..0..1..2..3....7..0..1..2..3....0..8..1..3..4....7..0..1..2..4
..5.13.14..8..4...12..5.14..8..4....5..6..2..7..9....5..6.14..3..9
.10..6.11.12..9...10..6.11.13..9...10.11.12.13.14...10.11.12..8.13
CROSSREFS
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 10 2015
STATUS
approved