The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A112886 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A112886

Positive integers that have no triangular divisors > 1.
(history; published version)

#27 by Hugo Pfoertner at Sat Jul 03 08:05:57 EDT 2021

STATUS

reviewed

approved

#26 by Joerg Arndt at Sat Jul 03 01:39:15 EDT 2021

STATUS

proposed

reviewed

#25 by Jon E. Schoenfield at Fri Jul 02 22:53:37 EDT 2021

STATUS

editing

proposed

#24 by Jon E. Schoenfield at Fri Jul 02 22:53:09 EDT 2021

NAME

Triangle-free positive Positive integers that have no triangular divisors > 1.

COMMENTS

Those Sequence consists of those positive integers not in A113502.

EXTENSIONS

Name edited (based on a suggestion from Michel Marcus) by Jon E. Schoenfield, Jul 02 2021

STATUS

approved

editing

Discussion

Fri Jul 02

22:53

Jon E. Schoenfield: (For Michel's suggestion, see the history.)  'Any objections?

#23 by N. J. A. Sloane at Thu Jul 01 16:08:28 EDT 2021

STATUS

proposed

approved

#22 by Michel Marcus at Thu Jul 01 13:41:21 EDT 2021

STATUS

editing

proposed

Discussion

Thu Jul 01

13:52

Felix Fröhlich: I am not really a fan of the name of this sequence.

15:05

Michel Marcus: Integers that have no triangular divisors > 1.   ??

#21 by Michel Marcus at Thu Jul 01 13:41:18 EDT 2021

CROSSREFS

Cf. A113502, A000217, A005117, A132895.

#20 by Michel Marcus at Thu Jul 01 13:40:57 EDT 2021

COMMENTS

a(n) = A132895(n)/2. - Ray Chandler, May 29 2008

FORMULA

a(n) = A132895(n)/2. - Ray Chandler, May 29 2008

STATUS

approved

editing

#19 by Charles R Greathouse IV at Sun Jul 31 12:28:54 EDT 2016

STATUS

editing

approved

#18 by Charles R Greathouse IV at Sun Jul 31 12:24:43 EDT 2016

LINKS

Charles R Greathouse IV, <a href="/A112886/b112886.txt">Table of n, a(n) for n = 1..10000</a>

STATUS

approved

editing