OFFSET
7,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 7..2000
EXAMPLE
a(8) = 2: [7,1], [1,7].
a(9) = 1: [1,7,1].
a(10) = 8: [8,2], [7,2,1], [7,1,2], [2,8], [2,7,1], [2,1,7], [1,7,2], [1,2,7].
a(11) = 12: [7,3,1], [7,1,3], [7,1,2,1], [3,7,1], [3,1,7], [2,1,7,1], [1,7,3], [1,7,2,1], [1,7,1,2], [1,3,7], [1,2,7,1], [1,2,1,7].
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Jul 09 2012
STATUS
approved