The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A119188 Triangular numbers composed of digits {3,5,7}. 2
3, 55, 5735537337753, 53737577757753, 335355753333373553355, 573535753575353335777335733757755, 7357333757773777355335733737733553753 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
a(8) > 10^37. - Tyler Busby, Mar 24 2023
LINKS
Table of n, a(n) for n=1..7.
Giovanni Resta, Tridigital Triangular Numbers.
FORMULA
a(n) = A000217(A119189(n)). - Tyler Busby, Mar 24 2023
CROSSREFS
Cf. A000217, A119189. See A119033 for a table of cross-references.
Sequence in context: A110058 A083869 A290773 * A111451 A285450 A280805
Adjacent sequences: A119185 A119186 A119187 * A119189 A119190 A119191
KEYWORD
nonn,base,more
AUTHOR
Giovanni Resta, May 10 2006
EXTENSIONS
a(6)-a(7) from Tyler Busby, Mar 24 2023
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified June 8 01:58 EDT 2024. Contains 373206 sequences. (Running on oeis4.)