|
Search: id:A071933
|
|
|
| A071933 |
|
a(n) = sum(i=1,n,K(i,i+1)) where K(x,y) is the Kronecker symbol (x/y). |
|
+0
1
|
|
| 1, 0, 1, 2, 3, 2, 3, 4, 5, 4, 3, 4, 5, 4, 5, 6, 7, 6, 7, 8, 9, 8, 7, 8, 9, 8, 7, 8, 9, 8, 9, 10, 11, 10, 11, 12, 13, 12, 13, 14, 15, 14, 13, 14, 15, 14, 13, 14, 15, 14, 15, 16, 17, 16, 15, 16, 17, 16, 15, 16, 17, 16, 17, 18, 19, 18, 19, 20, 21, 20, 21, 22, 23, 22, 21, 22, 23, 22, 23
(list; graph; listen)
|
|
|
OFFSET
|
1,4
|
|
|
FORMULA
|
a(n) = n/4 + 0(n) asymptotically
|
|
PROGRAM
|
(PARI) for(n=1, 100, print1(sum(i=1, n, kronecker(i, i+1)), ", "))
|
|
CROSSREFS
|
Sequence in context: A034697 A110157 A125929 this_sequence A064672 A138554 A063772
Adjacent sequences: A071930 A071931 A071932 this_sequence A071934 A071935 A071936
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Benoit Cloitre (benoit7848c(AT)orange.fr), Jun 14 2002
|
|
|
Search completed in 0.002 seconds
|
