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A171504 a(n) = n-th nonprime + n. 1
2, 6, 9, 12, 14, 16, 19, 22, 24, 26, 29, 32, 34, 36, 39, 41, 43, 45, 47, 50, 53, 55, 57, 59, 61, 64, 66, 68, 71, 74, 76, 78, 81, 83, 85, 87, 89, 92, 94, 96, 98, 100, 103, 106, 108, 110, 112, 114, 117, 119 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Complement of A171512(n). - Jaroslav Krizek, Dec 13 2009

LINKS

Table of n, a(n) for n=1..50.

FORMULA

a(n) = A018252(n) + n.

EXAMPLE

For n=3: 3rd nonprime is 6, 6 + 3 = 9.

PROG

(PARI) lista(nn) = {vn = vector(nn, n, n); vp = select(x->(! isprime(x)), vn); for (n=1, #vp, print1(vp[n] + n, ", ")); } \\ Michel Marcus, Feb 02 2015

CROSSREFS

Sequence in context: A287126 A270095 A153043 * A287445 A119720 A173978

Adjacent sequences:  A171501 A171502 A171503 * A171505 A171506 A171507

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Dec 10 2009

STATUS

approved

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Last modified August 19 04:27 EDT 2019. Contains 326109 sequences. (Running on oeis4.)