OFFSET
6,2
LINKS
Alois P. Heinz and Vaclav Kotesovec, Table of n, a(n) for n = 6..2000 (first 250 terms from Alois P. Heinz)
FORMULA
a(n) ~ c * d^n, where d = 1.70794647064333012330..., c = 0.5176707727128993957... . - Vaclav Kotesovec, Sep 01 2014
EXAMPLE
a(7) = 2: [6,1], [1,6].
a(8) = 1: [1,6,1].
a(9) = 8: [7,2], [6,2,1], [6,1,2], [2,7], [2,6,1], [2,1,6], [1,6,2], [1,2,6].
a(10) = 12: [6,3,1], [6,1,3], [6,1,2,1], [3,6,1], [3,1,6], [2,1,6,1], [1,6,3], [1,6,2,1], [1,6,1,2], [1,3,6], [1,2,6,1], [1,2,1,6].
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 09 2012
STATUS
approved