A144430 a(n) = 1 + A144429(n).

2, 3, 4, 5, 7, 10, 11, 13, 16, 17, 19, 22, 23, 25, 28, 29, 31, 34, 35, 37, 40, 41, 43, 46, 47, 49, 52, 53, 55, 58, 59, 61, 64, 65, 67, 70, 71, 73, 76, 77, 79, 82, 83, 85, 88, 89, 91, 94, 95, 97, 100, 101, 103, 106, 107, 109, 112, 113, 115, 118, 119, 121, 124, 125, 127, 130

Offset: 1

Author

Milton L. Brown (miltbrown(AT)earthlink.net), Oct 13 2008

Keywords

• nonn
• easy
• less

Comments

If you cross out every 3rd term starting at 4 and cross out multiples of 5, the reduced sequence is 2, 3, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 49, 53, 59, 61, ... which starts with 14 primes.

Essentially the same as A047259. - Georg Fischer, Oct 07 2018

Links

• Muniru A Asiru, Table of n, a(n) for n = 1..2000

Crossrefs

Cf. A144429.

Programs

GAP

a:=[2,3,4,5,7];; for n in [6..70] do a[n]:=a[n-3]+6; od; a; # Muniru A Asiru, Oct 07 2018

Formula

a(n) = a(n-3) + 6, n > 5.

Extensions

Edited and extended by R. J. Mathar, Oct 15 2008