1,1

3 and 5 are twin primes.

If n=4, then 3*n - 5 = 7 (prime).

If n=28, then 3*n - 5 = 79 (prime).

Cf. A088879.

Sequence in context: A117247 A047407 A090697 this_sequence A028876 A053579 A074121

Adjacent sequences: A107300 A107301 A107302 this_sequence A107304 A107305 A107306

nonn

Parthasarathy Nambi (PachaNambi(AT)yahoo.com), May 20 2005