A133372 Semiprimes expressible as the sum of (at least two) consecutive semiprimes in at least 1 way.

10, 15, 25, 33, 39, 51, 58, 69, 77, 82, 85, 91, 93, 94, 95, 106, 115, 118, 122, 123, 133, 134, 142, 143, 146, 155, 158, 159, 161, 166, 177, 178, 185, 187, 201, 205, 209, 213, 215, 217, 219, 221, 226, 235, 237, 249, 253, 254, 262, 267, 274, 278, 291, 295, 298

Offset

1,1

Comments

This is to A067377 as A001358 is to A000040.

Links

Table of n, a(n) for n=1..55.

Formula

A001358 INTERSECTION A135363.

Example

a(1) = 10 = 4 + 6 = 2 * 5.
a(2) = 15 = 6 + 9 = 3 * 5.
a(3) = 25 = 6 + 9 + 10 = 5^2.

Crossrefs

Cf. A001358, A067377, A135363.

Sequence in context: A173477 A091022 A340731 * A100916 A001750 A231643

Adjacent sequences: A133369 A133370 A133371 * A133373 A133374 A133375

Keyword

easy,nonn

Author

Jonathan Vos Post, Dec 21 2007

Extensions

More terms from R. J. Mathar, Jan 13 2008

Status

approved