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

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A208280 Number of distinct values in n-th row of Pascal's triangle mod 10 (A008975). 2
1, 1, 2, 2, 3, 3, 4, 3, 4, 4, 4, 4, 6, 6, 4, 3, 4, 5, 6, 5, 5, 6, 7, 9, 3, 3, 4, 4, 5, 6, 4, 2, 4, 5, 4, 5, 5, 7, 7, 9, 5, 5, 7, 8, 8, 6, 6, 10, 7, 4, 4, 4, 6, 7, 6, 4, 5, 7, 7, 10, 6, 7, 6, 5, 6, 6, 6, 8, 7, 8, 7, 8, 7, 9, 5, 4, 5, 6, 7, 6, 5, 5, 6, 7, 7, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Reinhard Zumkeller, Table of n, a(n) for n = 0..10000

EXAMPLE

Smallest numbers m such that a(m) = n, m = 1,..,9:

   m  |  distinct terms in A008975(m,*)  | a(m)

-----+----------------------------------+-------

   0  |  [1]                             |    1

   2  |  [1, 2]                          |    2

   4  |  [1, 4, 6]                       |    3

   6  |  [0, 1, 5, 6]                    |    4

  17  |  [0, 1, 6, 7, 8]                 |    5

  12  |  [0, 1, 2, 4, 5, 6]              |    6

  22  |  [0, 1, 2, 3, 4, 5, 6]           |    7

  43  |  [0, 1, 3, 4, 5, 6, 8, 9]        |    8

  23  |  [0, 1, 3, 4, 5, 6, 7, 8, 9]     |    9

  47  |  [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]  |   10

PROG

(Haskell)

import Data.List (nub)

a208280 = length . nub . a008975_row

CROSSREFS

Sequence in context: A176075 A256555 A117119 * A139141 A122953 A259847

Adjacent sequences:  A208277 A208278 A208279 * A208281 A208282 A208283

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Feb 25 2012

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 December 4 06:33 EST 2021. Contains 349470 sequences. (Running on oeis4.)