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
Examples
a(1) = 10 = 4 + 6 = 2 * 5. a(2) = 15 = 6 + 9 = 3 * 5. a(3) = 25 = 6 + 9 + 10 = 5^2.
Extensions
More terms from R. J. Mathar, Jan 13 2008
Comments