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.

Showing 1-2 of 2 results.

A102151 Iccanobirt primes (1 of 15): Prime numbers in A102111.

Original entry on oeis.org

2, 7, 13, 33049, 118852511, 4737081270498735525597185686764838592126526518160799, 1077332507131387702854919470217222614007309564248616024722926341483527602546317
Offset: 1

Views

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

Crossrefs

Cf. A000040, A102111, A102152-A102165.

Formula

a(n) = A102111(A102131(n)).

A102132 Iccanobirt prime indices (2 of 15): Indices of prime numbers in A102112.

Original entry on oeis.org

4, 6, 7, 11, 38, 45, 176, 1148, 3097, 7601, 9258, 47435
Offset: 1

Views

Author

Jonathan Vos Post and Ray Chandler, Dec 31 2004

Keywords

Comments

No more terms through 5000.
a(13) > 50000. - Robert Price, Nov 07 2018

Crossrefs

Cf. A000040, A102112, A102131-A102145.

Programs

  • Mathematica
    a[n_] := a[n] = 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

A102112(a(n)) = A102152(n).

Extensions

a(10)-a(12) from Robert Price, Nov 07 2018
Showing 1-2 of 2 results.

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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