OFFSET
0,2
FORMULA
a(n) = sum_{k=0..n} A091150(n, k)*3^k.
EXAMPLE
a(3)=67=(1)+(4)3+(3)3^2+(1)3^3 since 3rd row of A091150 is {1,4,3,1}.
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Dec 22 2003
STATUS
approved