login
Fixed points in A083275.
1

%I #6 Jun 23 2015 11:21:36

%S 4,10,15,35,116,242,396

%N Fixed points in A083275.

%C Numbers n such that A083275(n) = n.

%C a(8) > 1200. - _Giovanni Resta_, Jun 23 2015

%o (PARI) v=[3];n=1;while(#v<300,s=-1+n*prod(i=1,#v,v[i]);if(ispseudoprime(s)&&!vecsearch(vecsort(v),n),v=concat(v,n);if(n==#v,print1(n,", "));n=0);n++)

%Y Cf. A083275.

%K nonn,hard,more

%O 1,1

%A _Derek Orr_, Jun 22 2015

%E a(7) from _Giovanni Resta_, Jun 23 2015