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A175216 The first nonprimes after the primes. 1
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 19 04:01 EDT 2021. Contains 345125 sequences. (Running on oeis4.)