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A120819 Indices of primes in A057137. 11
171, 277, 367, 561, 567, 18881 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Digits are in ascending order beginning with 1 and after 9 comes 0.

Indices of primes in A057137.

REFERENCES

Clifford A. Pickover, A Passion for Mathematics, Wiley, 2005; see p. 61, 298.

LINKS

Table of n, a(n) for n=1..6.

EXAMPLE

a(1) = 12345678901234567890...01234567890...012345678901 = A057137(171) is the first prime term in A057137.

MATHEMATICA

fQ[n_] := PrimeQ@ FromDigits@ Mod[Range@n, 10]; lst = {}; Do[ If[fQ@n, AppendTo[lst, n]; Print@n], {n, 10000}]; lst

PROG

(PARI) N=0; for(n=1, 600, if(ispseudoprime(N=10*N+n%10), print1(n", "))) \\ Charles R Greathouse IV, May 10 2014

CROSSREFS

Cf. A006055, A057137, A120828, A120820, A120821, A120822, A120823, A120824, A120825, A120826, A120827.

Sequence in context: A101273 A136365 A031900 * A115078 A183996 A062907

Adjacent sequences:  A120816 A120817 A120818 * A120820 A120821 A120822

KEYWORD

base,hard,nonn

AUTHOR

Robert G. Wilson v, Jul 05 2006

EXTENSIONS

18881 from Arjen K. Lenstra, Feb 20 2012

STATUS

approved

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Last modified January 22 05:11 EST 2019. Contains 319353 sequences. (Running on oeis4.)