[seqfan] A070552: a(n) = A109373(n) - 1.

zak seidov zakseidov at yahoo.com
Wed Dec 19 12:24:36 CET 2018


In A109373 Formula a(n) = A070552(n) + 1.
Can anybody add corresponding formula in A070552, thx

A070552 Numbers n such that n and n+1 are semiprimes.
A109373 Semiprimes of the form semiprime + 1.

  


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