A102136 Iccanobirt prime indices (6 of 15): Indices of prime numbers in A102116.

4, 6, 7, 12, 18, 20, 121, 2280, 2521, 8123, 9072, 12411, 27520

Offset: 1

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

• nonn
• more
• base

Comments

No more terms through 5000.

a(14) > 50000. - Robert Price, Nov 08 2018

Crossrefs

Cf. A000040, A102116, A102131-A102145.

Programs

Mathematica

a[n_] := a[n] =
   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

A102116(a(n)) = A102156(n).

Extensions

a(10)-a(13) from Robert Price, Nov 08 2018