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 A068504 Highest power of 2 dividing prime(n)+1. 2
 1, 4, 2, 8, 4, 2, 2, 4, 8, 2, 32, 2, 2, 4, 16, 2, 4, 2, 4, 8, 2, 16, 4, 2, 2, 2, 8, 4, 2, 2, 128, 4, 2, 4, 2, 8, 2, 4, 8, 2, 4, 2, 64, 2, 2, 8, 4, 32, 4, 2, 2, 16, 2, 4, 2, 8, 2, 16, 2, 2, 4, 2, 4, 8, 2, 2, 4, 2, 4, 2, 2, 8, 16, 2, 4, 128, 2, 2, 2, 2, 4, 2, 16, 2, 8, 4, 2, 2, 2, 16, 4, 32, 8, 4, 4, 8, 2 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 FORMULA a(n) = A006519(A008864(n)). - Michel Marcus, Nov 24 2013 a(n) = 2^A023512(n). - Michel Marcus, Nov 24 2013 MAPLE f:= n -> 2^padic:-ordp(ithprime(n)+1, 2): map(f, [\$1..100]); # Robert Israel, Jan 13 2017 PROG (PARI) a(n) = 2^valuation(prime(n)+1, 2); \\ Michel Marcus, Nov 24 2013 CROSSREFS Sequence in context: A026142 A095399 A250718 * A080965 A083703 A066104 Adjacent sequences:  A068501 A068502 A068503 * A068505 A068506 A068507 KEYWORD easy,nonn AUTHOR Benoit Cloitre, Mar 11 2002 STATUS approved

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Last modified August 18 20:02 EDT 2019. Contains 326109 sequences. (Running on oeis4.)