|
Search: id:A080396
|
|
|
| A080396 |
|
Largest squarefree numbers dividing C[n,k] binomial coefficients read by row, 0<=k<=n.Square-free kernel of Pascal triangle. |
|
+0
1
|
|
| 1, 1, 1, 1, 2, 1, 1, 3, 3, 1, 1, 2, 6, 2, 1, 1, 5, 10, 10, 5, 1, 1, 6, 15, 10, 15, 6, 1, 1, 7, 21, 35, 35, 21, 7, 1, 1, 2, 14, 14, 70, 14, 14, 2, 1, 1, 3, 6, 42, 42, 42, 42, 6, 3, 1, 1, 10, 15, 30, 210, 42, 210, 30, 15, 10, 1, 1, 11, 55, 165, 330, 462, 462, 330, 165, 55, 11, 1, 1, 6, 66
(list; table; graph; listen)
|
|
|
OFFSET
|
0,5
|
|
|
FORMULA
|
a(n)=A007947(A07318(n))
|
|
EXAMPLE
|
Triangle begins:
1,
1,1,
1,2,1,
1,3,3,1,
1,2,6,2,1,
1,5,10,10,5,
1,1,6,15,10,15,6,1, ...
|
|
CROSSREFS
|
Cf. A007318, A007947.
Adjacent sequences: A080393 A080394 A080395 this_sequence A080397 A080398 A080399
Sequence in context: A132422 A065133 A080381 this_sequence A027948 A095141 A095140
|
|
KEYWORD
|
nonn,tabl
|
|
AUTHOR
|
Labos E. (labos(AT)ana.sote.hu), Mar 19 2003
|
|
|
Search completed in 0.002 seconds
|
