A259262 Fixed points in A083275.

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

Offset: 1

Author

Derek Orr, Jun 22 2015

Keywords

• nonn
• hard
• more

Comments

Numbers n such that A083275(n) = n.

a(8) > 1200. - Giovanni Resta, Jun 23 2015

Crossrefs

Cf. A083275.

Programs

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++)

Extensions

a(7) from Giovanni Resta, Jun 23 2015