A092189 Numbers k such that the sum of the first k semiprimes is a semiprime.

1, 2, 6, 11, 12, 13, 16, 20, 24, 25, 29, 34, 38, 41, 42, 43, 50, 53, 58, 61, 65, 66, 68, 77, 100, 102, 106, 110, 111, 117, 120, 123, 131, 134, 150, 151, 152, 154, 157, 162, 164, 165, 166, 174, 176, 178, 180, 183, 185, 187, 192, 205, 208, 210, 218, 221, 222, 231

Offset

1,2

Links

Zak Seidov, Table of n, a(n) for n = 1..50000

Example

2 is a term because the sum of the first two semiprimes, 4 and 6, is 10, which is a semiprime.

Crossrefs

Resulting semiprimes: A092190.

Sequence in context: A243157 A274689 A123112 * A228061 A357776 A191772

Adjacent sequences: A092186 A092187 A092188 * A092190 A092191 A092192

Keyword

easy,nonn

Author

Zak Seidov, Feb 23 2004

Status

approved