OFFSET
1,2
FORMULA
a(n) = A139286(n)/8.
MATHEMATICA
2^(2#-1)/8&/@Prime[Range[20]] (* Harvey P. Dale, Aug 19 2012 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Apr 13 2008
EXTENSIONS
More terms from Jon E. Schoenfield, Jul 16 2010
STATUS
approved