cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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A102134 Iccanobirt prime indices (4 of 15): Indices of prime numbers in A102114.

Original entry on oeis.org

4, 6, 7, 22, 32, 48, 58, 61, 80, 85, 119, 136, 150, 184, 420, 591, 878, 2447, 30938
Offset: 1

Views

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

Comments

No more terms through 5000.
No more terms through 7500. From Harvey P. Dale, May 30 2012
a(20) > 50000. - Robert Price, Nov 08 2018

Crossrefs

Cf. A000040, A102114, A102131-A102145.

Programs

  • Mathematica
    nxt[{a_,b_,c_}]:={b,c,FromDigits[Reverse[IntegerDigits[c]]]+b+a}; Flatten[ Position[Transpose[NestList[nxt,{0,0,1},2500]][[1]],?PrimeQ]-1] (* _Harvey P. Dale, May 30 2012 *)

Formula

A102114(a(n)) = A102154(n).

Extensions

a(19) from Robert Price, Nov 08 2018
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Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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