OFFSET
1,1
COMMENTS
All but the first term are even.
FORMULA
a(n)= A031131(2n-1). - R. J. Mathar, Feb 27 2009
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Paul Curtz, Jan 19 2009
EXTENSIONS
Edited and extended by R. J. Mathar, Feb 27 2009
STATUS
approved