**Numbers n such that both A000203(n)-n-1 and A000203(n)-2*n-1 are prime numbers, and sigma(n)-2*n-1 > 5.**

*30, 42, 60, 78, 102, 138, 186, 198, 216, 222, 228, 240, 246, 258, 270, 282, 360, 372*

*2 seqfan posts*

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

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