login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A119231 Numbers k such that the k-th triangular number contains only digits {6,7,8}. 2
3, 11, 12, 36, 116, 132, 1163, 1332, 13332, 133332, 1333332, 3941747, 11737707, 13333332, 133333332, 1333333332, 13333333332, 133333333332, 416381478667, 1254414499811, 1333333333332, 4187521168132, 11635005525283 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..23.

G. Resta, Tridigital Triangular Numbers

CROSSREFS

Cf. A000217, A119230. See A119034 for a table of cross-references.

Sequence in context: A055046 A141386 A254220 * A177335 A031449 A305859

Adjacent sequences:  A119228 A119229 A119230 * A119232 A119233 A119234

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, May 10 2006

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 23 14:40 EDT 2021. Contains 347618 sequences. (Running on oeis4.)