

A084997


Numbers which can be written as the sum as well as the product of 2 primes, not necessarily the same.


2



4, 6, 10, 14, 15, 21, 22, 26, 33, 34, 38, 39, 46, 55, 58, 62, 69, 74, 82, 85, 86, 91, 94, 106, 111, 115, 118, 122, 129, 133, 134, 141, 142, 146, 158, 159, 166, 178, 183, 194, 201, 202, 206, 213, 214, 218, 226, 235, 253, 254, 259, 262, 265, 274, 278
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OFFSET

1,1


COMMENTS

Intersection of A014091 and A001358; A100484 is a subsequence.


LINKS

Table of n, a(n) for n=1..55.
Eric Weisstein's World of Mathematics, Goldbach Conjecture
Index entries for sequences related to Goldbach conjecture


EXAMPLE

n=14: 11 + 3 = 14 and 2 * 7 = 14, therefore 14 is a term;
n=15: 13 + 2 = 15 and 3 * 5 = 15, therefore 15 is a term.
E.g. 21 = 19 + 2, 19 and 2 are prime and 21 = 7 * 3, 7 and 3 are primes.
Example: 9 = 3*3 and 2+7


CROSSREFS

Cf. A014091, A100962.
Sequence in context: A144592 A268185 A065073 * A300912 A175706 A110507
Adjacent sequences: A084994 A084995 A084996 * A084998 A084999 A085000


KEYWORD

nonn,easy


AUTHOR

Meenakshi Srikanth (menakan_s(AT)yahoo.com), Jun 30 2003


EXTENSIONS

Corrected and extended by Michael Lahm (mpl148(AT)psu.edu), Apr 24 2006
More terms from Joseph A. Agnew (jaa249(AT)psu.edu), Apr 30 2006


STATUS

approved



