The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A101001

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A101001

Indices of primes in sequence defined by A(0) = 91, A(n) = 10*A(n-1) + 11 for n > 0.
(history; published version)

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

LINKS

Makoto Kamada, <a href="httphttps://stdkmd.comnet/nrr/9/92221.htm#prime">Prime numbers of the form 922...221</a>.

Discussion

Thu Jan 17

13:44

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

#17 by Bruno Berselli at Wed Nov 04 04:16:30 EST 2015

STATUS

reviewed

approved

#16 by Michel Marcus at Wed Nov 04 00:43:23 EST 2015

STATUS

proposed

reviewed

#15 by Robert Price at Tue Nov 03 19:27:01 EST 2015

STATUS

editing

proposed

#14 by Robert Price at Tue Nov 03 19:26:57 EST 2015

COMMENTS

a(18) > 10^5. - Robert Price, Nov 03 2015

MATHEMATICA

Select[Range[0, 100000], PrimeQ[(830*10^# - 11)/9] &] (* Robert Price, Nov 03 2015 *)

STATUS

approved

editing

#13 by Ray Chandler at Tue Apr 28 11:46:41 EDT 2015

STATUS

editing

approved

#12 by Ray Chandler at Tue Apr 28 11:46:33 EDT 2015

DATA

2, 3, 23, 38, 62, 75, 107, 165, 519, 1809, 2348, 2561, 5783, 6447, 11691, 16035, 17553

EXTENSIONS

a(15)-a(17) from Kamada data by Ray Chandler, Apr 28 2015

STATUS

approved

editing

#11 by Ray Chandler at Tue Apr 28 11:42:05 EDT 2015

STATUS

editing

approved

#10 by Ray Chandler at Tue Apr 28 11:42:01 EDT 2015

FORMULA

a(n) = A103093(n) - 1.

CROSSREFS

Cf. A000533, A002275, A103093.

a(n) = A103093(n) - 1.

#9 by Ray Chandler at Tue Apr 28 11:41:24 EDT 2015

LINKS

Makoto Kamada, <a href="http://stdkmd.com/nrr/9/92221.htm#prime">Factorizations of near-repdigit Prime numbers of the form 922...221</a>.

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

STATUS

approved

editing