**Numbers n such that n and n+2 are semiprimes.**

*4, 33, 49, 55, 85, 91, 93, 119, 121, 141, 143, 159, 183, 185, 201, 203, 213, 215, 217*

*4 seqfan posts*

*Thu Aug 12 21:07:41 CEST 2010* [seqfan] Re: Is this right? Main diagonal A[n.n] of array A[k, n] = n-th natural number m such that m and m+2 are both divisible by exactly k primes (counted with multiplicity).

*Thu Aug 12 20:48:48 CEST 2010* [seqfan] Re: Is this right? Main diagonal A[n.n] of array A[k, n] = n-th natural number m such that m and m+2 are both divisible by exactly k primes (counted with multiplicity).

*Thu Aug 12 20:24:17 CEST 2010* [seqfan] Re: Is this right? Main diagonal A[n.n] of array A[k, n] = n-th natural number m such that m and m+2 are both divisible by exactly k primes (counted with multiplicity).

*Thu Aug 12 20:05:40 CEST 2010* [seqfan] Is this right? Main diagonal A[n.n] of array A[k, n] = n-th natural number m such that m and m+2 are both divisible by exactly k primes (counted with multiplicity).

Index of A-numbers in seqfan: by ascending order
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