The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | 2 |
| 9 | 3 |
| 10 | 4 |
| 11 | 6 |
| 12 | 7 |
| 13 | 11 |
| 14 | 14 |
| 15 | 20 |
| 16 | 27 |
| 17 | 39 |
| 18 | 52 |
| 19 | 75 |
| 20 | 102 |
| 21 | 145 |
| 22 | 201 |
| 23 | 286 |
| 24 | 397 |
| 25 | 565 |
| 26 | 791 |
| 27 | 1123 |
| 28 | 1581 |
| 29 | 2248 |
| 30 | 3173 |
| 31 | 4517 |
| 32 | 6399 |
| 33 | 9112 |
| 34 | 12945 |
| 35 | 18457 |
| 36 | 26270 |
| 37 | 37502 |
| 38 | 53478 |
| 39 | 76416 |
| 40 | 109146 |
| 41 | 156135 |
| 42 | 223301 |
| 43 | 319764 |
| 44 | 457884 |
| 45 | 656288 |
| 46 | 940795 |
| 47 | 1349671 |
| 48 | 1936620 |
[0,0,1,1,1,1,2,2,3,4,6,7,11,14,20,27,39,52,75,102, 145,201,286,397,565,791,1123,1581,2248,3173,4517, 6399,9112,12945,18457,26270,37502,53478,76416, 109146,156135,223301,319764,457884,656288,940795, 1349671,1936620] |