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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 3 |
| 7 | 3 |
| 8 | 4 |
| 9 | 6 |
| 10 | 7 |
| 11 | 9 |
| 12 | 10 |
| 13 | 12 |
| 14 | 14 |
| 15 | 17 |
| 16 | 21 |
| 17 | 23 |
| 18 | 26 |
| 19 | 32 |
| 20 | 40 |
| 21 | 46 |
| 22 | 51 |
| 23 | 57 |
| 24 | 68 |
| 25 | 80 |
| 26 | 91 |
| 27 | 102 |
| 28 | 115 |
| 29 | 135 |
| 30 | 156 |
| 31 | 180 |
| 32 | 197 |
| 33 | 219 |
| 34 | 250 |
| 35 | 290 |
| 36 | 333 |
| 37 | 364 |
| 38 | 403 |
| 39 | 456 |
| 40 | 526 |
| 41 | 594 |
| 42 | 648 |
| 43 | 708 |
| 44 | 803 |
| 45 | 922 |
| 46 | 1037 |
| 47 | 1128 |
| 48 | 1223 |
| 49 | 1373 |
| 50 | 1560 |
| 51 | 1752 |
| 52 | 1902 |
| 53 | 2062 |
| 54 | 2300 |
| 55 | 2613 |
| 56 | 2926 |
| 57 | 3149 |
| 58 | 3378 |
| 59 | 3740 |
[1,1,1,1,2,3,3,3,4,6,7,9,10,12,14,17,21,23,26,32, 40,46,51,57,68,80,91,102,115,135,156,180,197,219, 250,290,333,364,403,456,526,594,648,708,803,922, 1037,1128,1223,1373,1560,1752,1902,2062,2300,2613, 2926,3149,3378,3740] |