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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A008953 Leading digits of triangular numbers n(n+1)/2. 3
1, 3, 6, 1, 1, 2, 2, 3, 4, 5, 6, 7, 9, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 6, 6, 7, 7, 7, 8, 8, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

a(n) = A000030(A000217(n)). [From Reinhard Zumkeller, May 12 2010]

LINKS

R. Zumkeller, Table of n, a(n) for n = 1..1000 [From Reinhard Zumkeller, May 12 2010]

CROSSREFS

A008954. [From Reinhard Zumkeller, May 12 2010]

Sequence in context: A016660 A142464 A177022 * A104611 A076790 A095693

Adjacent sequences:  A008950 A008951 A008952 * A008954 A008955 A008956

KEYWORD

nonn,base

AUTHOR

N. J. A. Sloane.

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified February 23 03:41 EST 2018. Contains 299473 sequences. (Running on oeis4.)