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1,1
If you take every second term of a(n) you get A031368.
Table of n, a(n) for n=1..62.
a(n) = Prime(OddPart(n)) = A000040(A000265(n)).
a(8) = Prime(OddPart(8)) = Prime(1) = 2.
a(9) = Prime(OddPart(9)) = Prime(9) = 23.
a(10) = Prime(OddPart(10)) = Prime(5) = 11.
Table[Prime[n/2^IntegerExponent[n, 2]], {n, 100}] (* T. D. Noe, Jun 18 2012 *)
Cf. A031368, A000265, A000040.
Sequence in context: A051612 A083456 A211932 * A303073 A068058 A192233
Adjacent sequences: A213639 A213640 A213641 * A213643 A213644 A213645
nonn
Jens AhlstrÃ¶m, Jun 17 2012
approved