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 | 2 |
| 4 | 2 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 6 |
| 9 | 12 |
| 10 | 0 |
| 11 | 0 |
| 12 | 0 |
| 13 | 2 |
| 14 | 52 |
| 15 | 520 |
| 16 | 2640 |
| 17 | 6720 |
| 18 | 6720 |
| 19 | 0 |
| 20 | 0 |
| 21 | 0 |
| 22 | 0 |
| 23 | 25 |
| 24 | 1770 |
| 25 | 53940 |
| 26 | 1012620 |
| 27 | 13487040 |
| 28 | 136745280 |
| 29 | 1094688000 |
| 30 | 7025356800 |
| 31 | 36084787200 |
| 32 | 145297152000 |
| 33 | 435891456000 |
| 34 | 871782912000 |
| 35 | 871782912000 |
[1,1,1,2,2,0,0,1,6,12,0,0,0,2,52,520,2640,6720, 6720,0,0,0,0,25,1770,53940,1012620,13487040, 136745280,1094688000,7025356800,36084787200, 145297152000,435891456000,871782912000, 871782912000] |