cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Showing 1-1 of 1 results.

A124785 Semiprime sopfr of semiprimes A115585.

Original entry on oeis.org

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

Views

Author

Zak Seidov, Nov 07 2006

Keywords

Comments

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

Examples

			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.

Formula

a(n)=sopfr(A115585(n))
Showing 1-1 of 1 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.