References to A175727

Numbers n such that both A000203(n)-n-1 and A000203(n)-2*n-1 are prime numbers.
30, 42, 60, 70, 78, 102, 138, 186, 198, 216, 222, 228, 240, 246, 258, 270, 282, 360


2 seqfan posts

Tue Aug 24 03:37:54 CEST 2010    [seqfan] Re: A180268
Mon Aug 23 23:38:21 CEST 2010    [seqfan] Re: A180268

Index of A-numbers in seqfan: by ascending order    by month    by frequency    by keyword
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