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A124785 Semiprime sopfr of semiprimes A115585. 2
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 (list; graph; refs; listen; history; text; internal format)
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

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Last modified May 19 21:29 EDT 2019. Contains 323410 sequences. (Running on oeis4.)