References to A039654

Prime reached by iterating f(x) = sigma(x)-1 on n, or zero if no prime is ever reached.
2, 3, 11, 5, 11, 7, 23, 71, 17, 11, 71, 13, 23, 23, 71, 17, 59, 19, 41, 31, 47, 23, 59, 71


5 seqfan posts

Fri May 7 06:05:24 CEST 2010    [seqfan] Re: Iterating sigma - 1
Fri May 7 05:49:28 CEST 2010    [seqfan] Re: Iterating sigma - 1
Fri May 7 05:45:43 CEST 2010    [seqfan] Re: Iterating sigma - 1
Thu May 6 23:46:51 CEST 2010    [seqfan] Re: Iterating sigma - 1
Thu May 6 22:51:15 CEST 2010    [seqfan] Iterating sigma - 1

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