A088184 Numbers that can be written as sum of two coprime semiprimes.

13, 19, 23, 25, 29, 31, 34, 35, 37, 39, 41, 43, 44, 46, 47, 49, 51, 53, 55, 57, 58, 59, 61, 63, 64, 65, 67, 68, 69, 71, 73, 74, 75, 76, 77, 79, 81, 82, 83, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 97, 98, 99, 100, 101, 102, 103, 104, 106, 107, 109, 111, 112, 113, 114

Offset

1,1

Comments

A088183(a(n))>0; complement of A088185.

Links

Table of n, a(n) for n=1..64.

Example

25 = 2*2+3*7, therefore 25 is a term;
2*2+2*11 is the only partition of n=26 into two semiprimes,
gcd(2*2,2*11)=2>1, therefore 26 is not a term.

Crossrefs

Cf. A001358.

Sequence in context: A050717 A335034 A188540 * A274407 A054986 A210582

Adjacent sequences: A088181 A088182 A088183 * A088185 A088186 A088187

Keyword

nonn

Author

Reinhard Zumkeller, Sep 22 2003

Status

approved