A085093 Distinct primes and composite numbers alternately such that the sum of a pair of successive terms is prime or composite alternately.

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, 30, 47, 26, 43, 28, 53, 36, 59, 38, 61, 40, 71, 32, 67, 34, 83, 44, 73, 54, 79, 48, 97, 42, 101, 50, 103, 46, 89, 60, 109, 58, 107, 56, 113, 66, 137, 62, 127, 52, 131, 68, 139, 72, 149

Offset

0,1

Comments

9 is the only odd composite member of this sequence.

Links

Table of n, a(n) for n=0..68.

Crossrefs

Sequence in context: A137616 A154581 A111689 * A194025 A281383 A275838

Adjacent sequences: A085090 A085091 A085092 * A085094 A085095 A085096

Keyword

nonn

Author

Amarnath Murthy and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jul 03 2003

Extensions

More terms from David Wasserman, Jan 26 2005

Status

approved