OFFSET
1,1
FORMULA
a(n) = A139286(n)/4.
MATHEMATICA
2^(2#-1)/4 & /@ Prime@ Range@ 15 (* Harvey P. Dale, Dec 16 2010 *)
PROG
(Magma) [2^(2*p-1)div 4: p in PrimesUpTo(200)] // Vincenzo Librandi, Dec 15 2010
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Apr 13 2008
EXTENSIONS
More terms from Jon E. Schoenfield, Jul 16 2010
STATUS
approved