login
A164383
Composite numbers of the form 4 + some prime.
1
6, 9, 15, 21, 27, 33, 35, 45, 51, 57, 63, 65, 75, 77, 87, 93, 105, 111, 117, 135, 141, 143, 153, 155, 161, 171, 177, 183, 185, 195, 201, 203, 215, 231, 237, 243, 245, 255, 261, 267, 273, 275, 285, 287, 297, 315, 321, 335, 341, 351, 357, 363, 371, 377, 387, 393
OFFSET
1,1
EXAMPLE
a(1)= 4+2(prime)=6 (composite). a(2)= 4+5(prime)=9 (composite). a(3)=4+11(prime) = 15 (composite).
MATHEMATICA
Select[4+Prime[Range[100]], CompositeQ] (* Harvey P. Dale, Oct 24 2017 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
EXTENSIONS
Edited, entries checked, by R. J. Mathar, Aug 20 2009
STATUS
approved