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A171508 Numbers that are not the sum of the k-th noncomposite number and k for any k >= 1. 1
1, 3, 5, 7, 8, 10, 11, 13, 14, 15, 16, 18, 19, 21, 22, 23, 24, 26, 27, 29, 30, 31, 32, 34, 35, 36, 37, 38, 39, 41, 42, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 56, 57, 59, 60, 61, 62, 64, 65, 66 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

MATHEMATICA

With[{nn=20}, Complement[Range[Prime[nn-1]], Total/@Thread[ {Join[{1}, Prime[ Range[nn-1]]], Range[nn]}]]] (* Harvey P. Dale, Nov 25 2012 *)

CROSSREFS

Cf. A090178, A008578.

Sequence in context: A186350 A189829 A175146 * A049068 A185602 A225554

Adjacent sequences:  A171505 A171506 A171507 * A171509 A171510 A171511

KEYWORD

nonn

AUTHOR

Jaroslav Krizek, Dec 10 2009

EXTENSIONS

Edited by N. J. A. Sloane, Dec 19 2009

STATUS

approved

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Last modified October 27 11:55 EDT 2021. Contains 348276 sequences. (Running on oeis4.)