A231575 Indices of primes in A001590.

4, 5, 7, 9, 25, 29, 49, 79, 1613, 15205

Offset: 1

Author

Robert Price, Nov 18 2013

Keywords

• nonn
• more

Comments

a(11) > 2*10^5.

Crossrefs

Cf. A001590, A231574, A000213, A056816, A157611.

Programs

PARI

v=[1,0,1]; for(n=4,1e4, if(ispseudoprime(t=v[1]+v[2]+v[3]), print1(n", ")); v=[v[2],v[3],t]) \\ Charles R Greathouse IV, Nov 18 2013

Formula

A001590(a(n)) = A231574(n). - Arthur O'Dwyer, 24 Jul 2024

Extensions

Name clarified by Arthur O'Dwyer, Jul 24 2024