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A171639 Sum of n-th nonprime number and n-th noncomposite number. 1
2, 6, 9, 13, 16, 21, 25, 31, 34, 39, 47, 51, 58, 63, 67, 72, 79, 86, 89, 97, 103, 106, 113, 118, 125, 135, 140, 143, 149, 153, 158, 173, 179, 186, 189, 200, 203, 211, 218, 223, 230, 237, 241, 253, 256, 261, 264, 277, 291, 296 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(n) = A008578(n) + A018252(n).

LINKS

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

FORMULA

a(n) = A064799(n-1) for n >= 2.

CROSSREFS

Sequence in context: A292659 A184869 A047276 * A054770 A184745 A113689

Adjacent sequences:  A171636 A171637 A171638 * A171640 A171641 A171642

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Dec 13 2009

STATUS

approved

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Last modified October 16 03:34 EDT 2019. Contains 328040 sequences. (Running on oeis4.)