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 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 6 |
| 7 | 8 |
| 8 | 22 |
| 9 | 30 |
| 10 | 70 |
| 11 | 100 |
| 12 | 220 |
| 13 | 320 |
| 14 | 668 |
| 15 | 988 |
| 16 | 1994 |
| 17 | 2982 |
| 18 | 5858 |
| 19 | 8840 |
| 20 | 17010 |
| 21 | 25850 |
| 22 | 48910 |
| 23 | 74760 |
| 24 | 139512 |
| 25 | 214272 |
| 26 | 395256 |
| 27 | 609528 |
| 28 | 1113362 |
| 29 | 1722890 |
| 30 | 3120510 |
| 31 | 4843400 |
| 32 | 8708110 |
| 33 | 13551510 |
| 34 | 24207958 |
| 35 | 37759468 |
| 36 | 67068244 |
| 37 | 104827712 |
| 38 | 185250068 |
[0,0,0,0,2,2,6,8,22,30,70,100,220,320,668,988, 1994,2982,5858,8840,17010,25850,48910,74760, 139512,214272,395256,609528,1113362,1722890, 3120510,4843400,8708110,13551510,24207958, 37759468,67068244,104827712,185250068] |