OFFSET
1,2
FORMULA
a(n) = sum_{k=1..n} A035513(n-k+1,k).
EXAMPLE
a(3)=3+7+6=16. a(4)=5+11+10+9=35.
MAPLE
CROSSREFS
KEYWORD
nonn
AUTHOR
R. J. Mathar, Jun 01 2009
STATUS
approved