[seqfan] Pairwise sums are all semiprimes.
zak seidov
zakseidov at yahoo.com
Sat Jun 12 11:51:32 CEST 2010
a(1) = 1; for n>1, a(n) = smallest number > a(n-1) such that the pairwise sums of elements are all semiprimes.
1,3,32,90
more terms?
Zak
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