login
Distinct primes and composite numbers alternately such that the sum of a pair of successive terms is prime or composite alternately.
0

%I #9 Jun 04 2022 21:30:38

%S 2,9,3,4,5,6,19,10,11,8,7,12,13,16,17,14,31,22,23,18,37,24,41,20,29,

%T 30,47,26,43,28,53,36,59,38,61,40,71,32,67,34,83,44,73,54,79,48,97,42,

%U 101,50,103,46,89,60,109,58,107,56,113,66,137,62,127,52,131,68,139,72,149

%N Distinct primes and composite numbers alternately such that the sum of a pair of successive terms is prime or composite alternately.

%C 9 is the only odd composite member of this sequence.

%K nonn

%O 0,1

%A _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 03 2003

%E More terms from _David Wasserman_, Jan 26 2005