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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 (list; graph; refs; listen; history; internal format)
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).

CROSSREFS

Cf. A000040, A002808, A107986, A046132.

Sequence in context: A139321 A020648 A020147 * A168544 A001748 A097426

Adjacent sequences:  A164380 A164381 A164382 * A164384 A164385 A164386

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Aug 14 2009

EXTENSIONS

Edited, entries checked, by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Aug 20 2009

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Last modified February 16 10:32 EST 2012. Contains 205904 sequences.