|
| |
|
|
A072391
|
|
D2(n,n) = Sum_{1<=k<=n} (d_n(k^2)), where d_a(k^2)=card{d: d|k and 1<=d<=a} for real a.
|
|
0
| |
|
|
1, 3, 5, 9, 11, 16, 18, 23, 28, 33, 35, 44, 46, 51, 56, 64, 66, 76, 78, 87, 92, 97, 99, 111, 118, 123, 129, 138, 140, 154, 156, 165, 170, 175, 180, 198, 200, 205, 210, 222, 224, 238, 240, 249, 259, 264, 266, 283, 292, 304, 309, 318, 320, 333, 338, 350, 355, 360
(list; graph; refs; listen; history; internal format)
|
| |
| |
|
|
