OFFSET
1,1
COMMENTS
Alternatively: the sequence of the numbers 3*k-1 for all nonprime 2*k-1, k >= 1.
LINKS
G. C. Greubel, Table of n, a(n) for n = 1..5000
MATHEMATICA
Flatten[Table[If[PrimeQ[2*n - 1], {}, 3*n - 1], {n, 1, 100}]]
CROSSREFS
KEYWORD
nonn,easy,less
AUTHOR
Roger L. Bagula, Jan 24 2010
EXTENSIONS
The two equivalent definitions separated by the Assoc. Editors of the OEIS, Feb 02 2010
STATUS
approved