The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A044836 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A044836

Positive integers having more base-10 runs of even length than odd.
(history; published version)

#20 by Sean A. Irvine at Sun Nov 08 23:06:41 EST 2020

STATUS

reviewed

approved

#19 by Joerg Arndt at Sun Nov 08 04:33:17 EST 2020

STATUS

proposed

reviewed

#18 by Kevin Ryde at Sat Nov 07 22:55:41 EST 2020

STATUS

editing

proposed

Discussion

Sun Nov 08

01:31

Joerg Arndt: The formulas in A044941 are clearly wrong.

04:33

Joerg Arndt: I edited A044941 a moment ago.

#17 by Kevin Ryde at Sat Nov 07 22:35:52 EST 2020

CROSSREFS

Number of even/odd runs: A044941, A044950. Cf. A044851 (no fewer), A044866 (same number).

STATUS

approved

editing

Discussion

Sat Nov 07

22:55

Kevin Ryde: I'm unsure about A044941 definition versus its claimed periodic formula.  It's count of even length runs in the decimal digits of n?  I'd make say A044941(1100) = 2 etc so not periodic ...

#16 by Joerg Arndt at Sat Nov 07 04:11:08 EST 2020

STATUS

reviewed

approved

#15 by Michel Marcus at Sat Nov 07 04:06:54 EST 2020

STATUS

proposed

reviewed

#14 by Rémy Sigrist at Sat Nov 07 03:52:19 EST 2020

STATUS

editing

proposed

#13 by Rémy Sigrist at Sat Nov 07 03:48:58 EST 2020

LINKS

Rémy Sigrist, <a href="/A044836/b044836.txt">Table of n, a(n) for n = 1..10000</a>

FORMULA

a(n) = A051022(n)*11 for n > 0. - Kritsada Moomuang, Oct 20 2019

PROG

(PARI) is(n, base=10) = { my (v=0); while (n, my (d=n%base, w=0); while (n%base==d, n\=base; w++); v+=(-1)^w); v>0 } \\ Rémy Sigrist, Nov 07 2020

CROSSREFS

Cf. A044828 (binary analog), A338754.

EXTENSIONS

Incorrect formula removed by Rémy Sigrist, Nov 07 2020

STATUS

approved

editing

Discussion

Sat Nov 07

03:52

Rémy Sigrist: added b-file + program + xref / removed formula

#12 by Sean A. Irvine at Wed Oct 23 20:00:53 EDT 2019

STATUS

proposed

approved

#11 by Michel Marcus at Sun Oct 20 10:28:40 EDT 2019

STATUS

editing

proposed

Discussion

Sun Oct 20

10:59

Kritsada Moomuang: Thank you for your edit.