The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A136333 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A136333

Numbers containing only digits coprime to 10 in their decimal representation.
(history; published version)

#26 by Michel Marcus at Thu Feb 15 01:56:01 EST 2024

STATUS

reviewed

approved

#25 by Joerg Arndt at Thu Feb 15 01:51:06 EST 2024

STATUS

proposed

reviewed

#24 by Amiram Eldar at Thu Feb 15 01:11:22 EST 2024

STATUS

editing

proposed

#23 by Amiram Eldar at Thu Feb 15 00:38:27 EST 2024

LINKS

Robert Baillie and Thomas Schmelzer, <a href="https://library.wolfram.com/infocenter/MathSource/7166/">Summing Kempner's Curious (Slowly-Convergent) Series</a>, Mathematica Notebook kempnerSums.nb, Wolfram Library Archive, 2008.

FORMULA

Sum_{n>=1} 1/a(n) = 2.395867871130444522329053889312125689319669370758630349552737883715872077555... (calculated using Baillie and Schmelzer's kempnerSums.nb, see Links). - Amiram Eldar, Feb 15 2024

CROSSREFS

Cf. A007090, A091633 (primes), A245193.

STATUS

approved

editing

#22 by Michael De Vlieger at Fri Feb 25 10:30:29 EST 2022

STATUS

reviewed

approved

#21 by Joerg Arndt at Fri Feb 25 09:57:50 EST 2022

STATUS

proposed

reviewed

#20 by Michel Marcus at Fri Feb 25 09:09:21 EST 2022

STATUS

editing

proposed

#19 by Michel Marcus at Fri Feb 25 09:09:15 EST 2022

PROG

(PARI) isok(m) = my(d=digits(m)); apply(x->gcd(x, 10), d) == vector(#d, k, 1); \\ Michel Marcus, Feb 25 2022

STATUS

approved

editing

#18 by Charles R Greathouse IV at Mon Feb 13 02:08:08 EST 2017

STATUS

editing

approved

#17 by Charles R Greathouse IV at Mon Feb 13 02:08:05 EST 2017

LINKS

<a href="/index/Ar#10-automatic">Index entries for 10-automatic sequences</a>.

CROSSREFS

Cf. A091633 (primes), A245193.

KEYWORD

nonn,base,easy

STATUS

approved

editing