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%I #13 Apr 10 2020 15:47:23
%S 4,6,7,12,18,20,121,2280,2521,8123,9072,12411,27520
%N Iccanobirt prime indices (6 of 15): Indices of prime numbers in A102116.
%C No more terms through 5000.
%C a(14) > 50000. - _Robert Price_, Nov 08 2018
%F A102116(a(n)) = A102156(n).
%t a[n_] := a[n] =
%t IntegerReverse[a[n - 1]] + IntegerReverse[a[n - 2]] + a[n - 3];
%t a[0] = 0; a[1] = 0; a[2] = 1;
%t Select[Range[0, 5000], PrimeQ[a[#]] &] (* _Robert Price_, Apr 10 2020 *)
%Y Cf. A000040, A102116, A102131-A102145.
%K nonn,more,base
%O 1,1
%A _Jonathan Vos Post_ and _Ray Chandler_, Dec 31 2004
%E a(10)-a(13) from _Robert Price_, Nov 08 2018