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1 together with lesser of twin primes.
Table of n, a(n) for n=1..52.
Sequence in context: A093326 A001359 A096292 * A078864 A208574 A023218
Adjacent sequences: A181744 A181745 A181746 * A181748 A181749 A181750
Juri-Stepan Gerasimov, Nov 08 2010
Definition and terms corrected by R. J. Mathar, Oct 15 2011