[seqfan] Re: put the numbers from 1 to n such the sum of two of them are prime

N. J. A. Sloane njas at research.att.com
Mon Mar 14 16:28:56 CET 2011

Franklin pointed out that one version of
the sequence is already in the OEIS (A051237 and A187869).

But the problem as stated by Claudio Meller seems not to be.
I entered a new sequence, A187871, which gives the beginning
of the sequence. Could someone extend it? And also enter the triangle
that is analogous to A051237.

The difference lies in whether the n-th number has to end with
"n", as in A051237 and A187869, or not (as in A187871).


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