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A262658 Base-10 representation of 1 and the primes at A262657. 3
1, 107, 10357, 12037097, 32227045657, 1582035465299, 3799607961594979, 5213093566867710049, 611235349109773213549, 32441088456711675411793, 2527020301920681532766561, 2174903961247108881101117191, 7682944139414403968828307261263 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Clark Kimberling, Table of n, a(n) for n = 1..300

EXAMPLE

n   A262657(n)    base-10 representation

1     1                1

2     21               107

3     42124            10357

MATHEMATICA

s = {1}; base = 7; z = 20; Do[NestWhile[# + 1 &, 1, ! PrimeQ[tmp = FromDigits[Join[#, IntegerDigits[Last[s]], Reverse[#]] &[IntegerDigits[#, base]], base]] &];

AppendTo[s, FromDigits[IntegerDigits[tmp, base]]], {z}]; s  (* A262657 *)

Map[FromDigits[ToString[#], base] &, s]  (* A262658 *)

(* Peter J. C. Moses, Sep 01 2015 *)

CROSSREFS

Cf. A262657.

Sequence in context: A250155 A240596 A185677 * A114356 A160488 A158476

Adjacent sequences:  A262655 A262656 A262657 * A262659 A262660 A262661

KEYWORD

nonn,easy,base

AUTHOR

Clark Kimberling, Oct 27 2015

STATUS

approved

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Last modified June 26 12:26 EDT 2022. Contains 354882 sequences. (Running on oeis4.)