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A262630 Base-10 representation of 1 and the primes at A262629. 3
1, 7, 31, 127, 5113, 303049, 130677919, 8561616127, 343370835961, 398015959727917, 6536129506258687661, 136824982467292060343, 1727891550586579544797, 518772379027828374941147, 33164398702973727192477403, 91254204345537698333055497929 (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   A262629(n)    base-10 representation

1   1                 1

2   111               7

3   11111             31

4   1111111           127

5   1001111111001     5113

MATHEMATICA

s = {1}; base = 2; 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  (* A262629 *)

Map[FromDigits[ToString[#], base] &, s]  (* A262630 *)

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

CROSSREFS

Cf. A262629. Subsequence of A016041 (except a(1)).

Sequence in context: A036282 A033474 A001896 * A282857 A296573 A180147

Adjacent sequences:  A262627 A262628 A262629 * A262631 A262632 A262633

KEYWORD

nonn,base

AUTHOR

Clark Kimberling, Oct 02 2015

STATUS

approved

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Last modified June 24 04:38 EDT 2019. Contains 324318 sequences. (Running on oeis4.)