OFFSET
1,3
FORMULA
a(n)=sum{j=1..n} A167707(j).
EXAMPLE
a(1)=0, a(2)=0+1=1, a(3)=0+1+3=4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Juri-Stepan Gerasimov, Nov 23 2009
EXTENSIONS
Formula and A-number corrected and entries checked by R. J. Mathar, Nov 24 2009
STATUS
approved