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 A213642 Primes with subscript that equals odd part of n. 0
 2, 2, 5, 2, 11, 5, 17, 2, 23, 11, 31, 5, 41, 17, 47, 2, 59, 23, 67, 11, 73, 31, 83, 5, 97, 41, 103, 17, 109, 47, 127, 2, 137, 59, 149, 23, 157, 67, 167, 11, 179, 73, 191, 31, 197, 83, 211, 5, 227, 97, 233, 41, 241, 103, 257, 17, 269, 109, 277, 47, 283, 127 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS If you take every second term of a(n) you get A031368. LINKS FORMULA a(n) = Prime(OddPart(n)) = A000040(A000265(n)). EXAMPLE a(8) = Prime(OddPart(8)) = Prime(1) = 2. a(9) = Prime(OddPart(9)) = Prime(9) = 23. a(10) = Prime(OddPart(10)) = Prime(5) = 11. MATHEMATICA Table[Prime[n/2^IntegerExponent[n, 2]], {n, 100}] (* T. D. Noe, Jun 18 2012 *) CROSSREFS Cf. A031368, A000265, A000040. Sequence in context: A051612 A083456 A211932 * A303073 A068058 A192233 Adjacent sequences:  A213639 A213640 A213641 * A213643 A213644 A213645 KEYWORD nonn AUTHOR Jens AhlstrÃ¶m, Jun 17 2012 STATUS approved

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Last modified January 22 19:50 EST 2020. Contains 331153 sequences. (Running on oeis4.)