%I #5 Dec 05 2013 19:56:17
%S 1,4,7,12,15,18,23
%N a(2n-1) is odd, a(2n) = even, such that the difference of two terms with different parity is a prime.
%C Sequence is finite with 23 as the last term.
%K easy,fini,full,nonn
%O 1,2
%A _Amarnath Murthy_, Jun 20 2003
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