A102144 Iccanobirt prime indices (14 of 15): Indices of prime numbers in A102124.

4, 6, 7, 12, 25, 43, 57, 165, 277, 368, 711, 1005, 1135, 1246, 2032, 3513, 5685, 8222, 10939, 26435

Offset: 1

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

• nonn
• more
• base

Comments

No more terms through 5000.

a(21) > 50000. - Robert Price, Nov 10 2018

Crossrefs

Cf. A000040, A102124, A102131-A102145.

Programs

Mathematica

a[n_] := a[n] =
   IntegerReverse[IntegerReverse[a[n - 1]] + IntegerReverse[a[n - 2]] + a[n - 3]];
a[0] = 0; a[1] = 0; a[2] = 1;
Select[Range[0, 5000], PrimeQ[a[#]] &] (* Robert Price, Apr 10 2020 *)

Formula

A102124(a(n)) = A102164(n).

Extensions

a(17)-a(20) from Robert Price, Nov 10 2018