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Odd numbers in A019320.
For primes in this sequence see: A153602
For composites see: A153603
Table of n, a(n) for n=1..41.
Sequence in context: A228118 A136186 A023210 * A153602 A136187 A328489
Adjacent sequences: A153598 A153599 A153600 * A153602 A153603 A153604
Artur Jasinski, Dec 29 2008
Edited by T. D. Noe, Apr 27 2009