A092191 Numbers n such that sum of n-th and (n+1)-th semiprimes is a semiprime.

1, 2, 9, 12, 14, 15, 16, 18, 20, 23, 24, 26, 30, 32, 34, 35, 36, 38, 43, 44, 49, 50, 54, 55, 56, 57, 58, 61, 62, 63, 66, 67, 68, 69, 73, 75, 80, 84, 88, 91, 93, 98, 99, 100, 103, 107, 108, 110, 112, 114, 118, 119, 124, 125, 128, 133, 137, 138, 146, 147, 150, 151, 153

Offset

1,2

Links

Table of n, a(n) for n=1..63.

Example

9 is a member because sum of 9th and 10th semiprimes, 25 and 26, is 51 which is a semiprime.

Crossrefs

Resulting semiprimes: A092192.

Sequence in context: A041335 A042147 A090517 * A030376 A080520 A032372

Adjacent sequences: A092188 A092189 A092190 * A092192 A092193 A092194

Keyword

easy,nonn

Author

Zak Seidov, Feb 23 2004

Status

approved