A124785 Semiprime sopfr of semiprimes A115585.

4, 6, 9, 10, 10, 15, 14, 21, 25, 14, 22, 33, 26, 39, 22, 34, 49, 55, 22, 46, 26, 69, 34, 85, 26, 62, 91, 46, 74, 38, 111, 115, 82, 86, 34, 129, 133, 58, 141, 34, 106, 159, 169, 38, 183, 134, 201, 142, 213, 94, 235, 74, 166, 46, 253, 106, 259, 58, 265, 46, 86, 118, 194

Offset

1,1

Comments

Cf. A001358 semiprimes, A001414 sopfr, A115585 Semiprimes with a semiprime sum of factors, A124786 Intersection of A115585 and A124785.

Links

Table of n, a(n) for n=1..63.

Formula

a(n)=sopfr(A115585(n))

Example

a(3)=9 because A115585(3)=14=2*7=>2+7=9=3*3,
a(6)=15 because A115585(6)=26=2*13=>2+13=15=3*5.

Crossrefs

Cf. A001358, A001414, A115585, A124786.

Sequence in context: A010378 A166593 A196269 * A010404 A010447 A112082

Adjacent sequences: A124782 A124783 A124784 * A124786 A124787 A124788

Keyword

nonn

Author

Zak Seidov, Nov 07 2006

Status

approved