A259261 Fixed points in A073673.

1, 2, 3, 13, 39, 55, 527, 776, 910, 942

Offset

1,2

Comments

Numbers k such that A073673(k) = k.

a(8) > 750. - R. J. Mathar, Jul 14 2015

Links

Table of n, a(n) for n=1..10.

Prog

(PARI) v=[1]; n=1; print1(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++)

Crossrefs

Cf. A073673.

Sequence in context: A100424 A347537 A289549 * A141511 A235615 A117528

Adjacent sequences: A259258 A259259 A259260 * A259262 A259263 A259264

Keyword

nonn,more,hard

Author

Derek Orr, Jun 22 2015

Extensions

a(8)-a(10) from Michael S. Branicky, May 19 2023

Status

approved