A175216 The first nonprimes after the primes.

4, 4, 6, 8, 12, 14, 18, 20, 24, 30, 32, 38, 42, 44, 48, 54, 60, 62, 68, 72, 74, 80, 84, 90, 98, 102, 104, 108, 110, 114, 128, 132, 138, 140, 150, 152, 158, 164, 168, 174, 180, 182, 192, 194, 198, 200, 212, 224, 228, 230, 234, 240, 242, 252, 258, 264, 270, 272

Offset

1,1

Comments

Essentially the same as A135731, A055670, A028815 and A008864. [From R. J. Mathar, Mar 13 2010]

Links

Table of n, a(n) for n=1..58.

Formula

a(1) = 4, for n >= 2, a(n) = A008864(n) = A000040(n) + 1.

Crossrefs

Sequence in context: A090682 A011982 A282939 * A053639 A100090 A222732

Adjacent sequences: A175213 A175214 A175215 * A175217 A175218 A175219

Keyword

nonn,easy

Author

Jaroslav Krizek, Mar 06 2010

Status

approved