login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A119211 Numbers n such that the n-th triangular number contains only digits {4,6,7}. 2
3, 11, 36, 976, 1236, 3048, 964131, 36536961224668, 123828734689848, 299247973315331 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

Next entry must be greater than 1.4*10^16.

LINKS

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119210. See A119034 for a table of cross-references.

Sequence in context: A119090 A048361 A119161 * A119235 A119233 A178563

Adjacent sequences:  A119208 A119209 A119210 * A119212 A119213 A119214

KEYWORD

nonn,base,more

AUTHOR

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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 17 16:39 EST 2012. Contains 206058 sequences.