OFFSET
8,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 8..2000
EXAMPLE
a(9) = 2: [8,1], [1,8].
a(10) = 1: [1,8,1].
a(11) = 8: [9,2], [8,2,1], [8,1,2], [2,9], [2,8,1], [2,1,8], [1,8,2], [1,2,8].
a(12) = 12: [8,3,1], [8,1,3], [8,1,2,1], [3,8,1], [3,1,8], [2,1,8,1], [1,8,3], [1,8,2,1], [1,8,1,2], [1,3,8], [1,2,8,1], [1,2,1,8].
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 09 2012
STATUS
approved