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) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 3 |
| 6 | 1 |
| 7 | 1 |
| 8 | 4 |
| 9 | 10 |
| 10 | 16 |
| 11 | 19 |
| 12 | 16 |
| 13 | 10 |
| 14 | 4 |
| 15 | 1 |
| 16 | 1 |
| 17 | 5 |
| 18 | 15 |
| 19 | 35 |
| 20 | 65 |
| 21 | 101 |
| 22 | 135 |
| 23 | 155 |
| 24 | 155 |
| 25 | 135 |
| 26 | 101 |
| 27 | 65 |
| 28 | 35 |
| 29 | 15 |
| 30 | 5 |
| 31 | 1 |
| 32 | 1 |
| 33 | 6 |
| 34 | 21 |
| 35 | 56 |
| 36 | 126 |
| 37 | 246 |
| 38 | 426 |
| 39 | 666 |
| 40 | 951 |
| 41 | 1246 |
| 42 | 1506 |
| 43 | 1686 |
| 44 | 1751 |
| 45 | 1686 |
| 46 | 1506 |
| 47 | 1246 |
| 48 | 951 |
| 49 | 666 |
| 50 | 426 |
| 51 | 246 |
| 52 | 126 |
| 53 | 56 |
| 54 | 21 |
| 55 | 6 |
| 56 | 1 |
| 57 | 1 |
| 58 | 7 |
| 59 | 28 |
| 60 | 84 |
| 61 | 210 |
| 62 | 462 |
| 63 | 917 |
[1,1,3,3,1,1,4,10,16,19,16,10,4,1,1,5,15,35,65, 101,135,155,155,135,101,65,35,15,5,1,1,6,21,56, 126,246,426,666,951,1246,1506,1686,1751,1686,1506, 1246,951,666,426,246,126,56,21,6,1,1,7,28,84,210, 462,917] |