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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 5 |
| 7 | 6 |
| 8 | 9 |
| 9 | 13 |
| 10 | 17 |
| 11 | 20 |
| 12 | 26 |
| 13 | 35 |
| 14 | 43 |
| 15 | 56 |
| 16 | 67 |
| 17 | 86 |
| 18 | 105 |
| 19 | 129 |
| 20 | 158 |
| 21 | 193 |
| 22 | 232 |
| 23 | 285 |
| 24 | 350 |
| 25 | 413 |
| 26 | 507 |
| 27 | 605 |
| 28 | 740 |
| 29 | 879 |
| 30 | 1059 |
| 31 | 1274 |
| 32 | 1521 |
| 33 | 1816 |
| 34 | 2164 |
| 35 | 2577 |
| 36 | 3059 |
| 37 | 3618 |
| 38 | 4307 |
| 39 | 5103 |
| 40 | 5989 |
| 41 | 7079 |
| 42 | 8334 |
| 43 | 9797 |
| 44 | 11483 |
| 45 | 13488 |
| 46 | 15740 |
| 47 | 18469 |
| 48 | 21536 |
| 49 | 25093 |
| 50 | 29273 |
[0,0,0,1,1,4,5,6,9,13,17,20,26,35,43,56,67,86,105, 129,158,193,232,285,350,413,507,605,740,879,1059, 1274,1521,1816,2164,2577,3059,3618,4307,5103,5989, 7079,8334,9797,11483,13488,15740,18469,21536, 25093,29273] |