A208280 Number of distinct values in n-th row of Pascal's triangle mod 10 (A008975).

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

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