The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A101071 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A101071

Indices of primes in sequence defined by A(0) = 83, A(n) = 10*A(n-1) + 23 for n > 0.
(history; published version)

#16 by Charles R Greathouse IV at Thu Jan 17 13:44:06 EST 2019

LINKS

Makoto Kamada, <a href="httphttps://stdkmd.comnet/nrr/8/85553.htm#prime">Prime numbers of the form 855...553</a>.

Discussion

Thu Jan 17

13:44

OEIS Server: https://oeis.org/edit/global/2791

#15 by Alois P. Heinz at Thu Oct 22 18:19:09 EDT 2015

STATUS

reviewed

approved

#14 by Michel Marcus at Thu Oct 22 16:31:49 EDT 2015

STATUS

proposed

reviewed

#13 by Robert Price at Thu Oct 22 11:24:22 EDT 2015

STATUS

editing

proposed

#12 by Robert Price at Thu Oct 22 11:22:38 EDT 2015

DATA

0, 1, 6, 43, 55, 337, 1210, 2692, 3535, 3916, 3973, 4045, 6960, 23770, 69655

COMMENTS

a(16) > 10^5. - Robert Price, Oct 22 2015

MATHEMATICA

Select[Range[0, 100000], PrimeQ[(770*10^# - 23)/9] &] (* Robert Price, Oct 22 2015 *)

EXTENSIONS

a(15) from Robert Price, Oct 22 2015

STATUS

approved

editing

#11 by Ray Chandler at Wed Apr 29 14:31:36 EDT 2015

STATUS

editing

approved

#10 by Ray Chandler at Wed Apr 29 14:31:32 EDT 2015

DATA

0, 1, 6, 43, 55, 337, 1210, 2692, 3535, 3916, 3973, 4045, 6960, 23770

EXTENSIONS

a(14) from Kamada data by Ray Chandler, Apr 29 2015

STATUS

approved

editing

#9 by Ray Chandler at Wed Apr 29 14:29:13 EDT 2015

STATUS

editing

approved

#8 by Ray Chandler at Wed Apr 29 14:29:10 EDT 2015

LINKS

Makoto Kamada, <a href="http://stdkmd.com/nrr/8/85553.htm#prime">Factorizations of near-repdigit Prime numbers of the form 855...553</a>.

<a href="/index/Pri#Pri_rep">Index entries for primes involving repunits</a>.

FORMULA

a(n) = A103084(n) - 1.

CROSSREFS

Cf. A000533, A002275, A103084.

a(n) = A103084(n) - 1.

STATUS

approved

editing

#7 by N. J. A. Sloane at Wed Apr 22 17:56:19 EDT 2015

LINKS

Makoto Kamada, <a href="http://homepage2.niftystdkmd.com/m_kamada/mathnrr/factorizations.htm">Factorizations of near-repdigit numbers</a>.

Discussion

Wed Apr 22

17:56

OEIS Server: https://oeis.org/edit/global/2426