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A092189 Numbers n such that sum of first n semiprimes is a semiprime. +0
2
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 (list; graph; listen)
OFFSET

1,2

EXAMPLE

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

CROSSREFS

Resulting semiprimes: A092190.

Sequence in context: A136699 A033710 A123112 this_sequence A057976 A140486 A138327

Adjacent sequences: A092186 A092187 A092188 this_sequence A092190 A092191 A092192

KEYWORD

easy,nonn

AUTHOR

Zak Seidov (zakseidov(AT)yahoo.com), Feb 23 2004

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Last modified November 25 14:49 EST 2009. Contains 167514 sequences.


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