The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A119172 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A119172

Triangular numbers composed of digits {2,6,7}.
(history; published version)

#12 by N. J. A. Sloane at Sat May 27 18:40:05 EDT 2023

STATUS

editing

approved

#11 by N. J. A. Sloane at Sat May 27 18:40:02 EDT 2023

EXTENSIONS

New lower bound for further terms from Max Alekseyev, May 07 2009

STATUS

approved

editing

#10 by Michael De Vlieger at Wed Mar 29 15:03:32 EDT 2023

STATUS

reviewed

approved

#9 by Michel Marcus at Wed Mar 29 14:41:03 EDT 2023

STATUS

proposed

reviewed

#8 by Tyler Busby at Wed Mar 29 14:39:04 EDT 2023

STATUS

editing

proposed

#7 by Tyler Busby at Wed Mar 29 14:38:51 EDT 2023

COMMENTS

Next entry must be greater than 10^37.

a(13) > 10^40. - Tyler Busby, Mar 29 2023

LINKS

G. Giovanni Resta, <a href="http://www.numbersaplenty.com/tr/tr267.html">Tridigital Triangular Numbers</a>.

FORMULA

a(n) = A000217(A119173(n)). - Tyler Busby, Mar 29 2023

STATUS

approved

editing

#6 by Giovanni Resta at Thu Oct 08 04:56:32 EDT 2015

STATUS

editing

approved

#5 by Giovanni Resta at Thu Oct 08 04:56:26 EDT 2015

LINKS

G. Resta, <a href="http://www.iit.cnrnumbersaplenty.it/staffcom/giovanni.restatr/tritritr267.txthtml">Tridigital Triangular Numbers</a>

STATUS

approved

editing

#4 by Russ Cox at Fri Mar 30 17:40:42 EDT 2012

AUTHOR

_Giovanni Resta (g.resta(AT)iit.cnr.it), _, May 10 2006

Discussion

Fri Mar 30

17:40

OEIS Server: https://oeis.org/edit/global/192

#3 by Russ Cox at Fri Mar 30 17:26:54 EDT 2012

EXTENSIONS

New lower bound for further terms from _Max Alekseyev (maxale(AT)gmail.com), _, May 07 2009

Discussion

Fri Mar 30

17:26

OEIS Server: https://oeis.org/edit/global/140