A262642 - OEIS

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A262642

Base-10 representation of 1 and the primes at A262641.

1, 31, 2659, 28921, 20254277, 222258347161, 6703502508238897, 2849796577598550571, 163260594826469315359, 78587320839900014133983, 63082726980138277941240209, 28861909227691304085982177103, 17774573388934687063056536849453

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OFFSET

1,2

LINKS

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

EXAMPLE

n A262641(n) base-10 representation

1 1 1

2 111 31

3 41114 2659

MATHEMATICA

s = {3}; base = 4; 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 (* A262639 *)

Map[FromDigits[ToString[#], base] &, s] (* A262640 *)

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

CROSSREFS

Cf. A262641.

Sequence in context: A062987 A302137 A136245 * A273983 A173563 A190527

Adjacent sequences: A262639 A262640 A262641 * A262643 A262644 A262645

KEYWORD

nonn,easy,base

AUTHOR

Clark Kimberling, Oct 24 2015

STATUS

approved