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 | 10 |
| 4 | 1 |
| 5 | 84 |
| 6 | 280 |
| 7 | 1 |
| 8 | 220 |
| 9 | 462 |
| 10 | 9240 |
| 11 | 15400 |
| 12 | 1 |
| 13 | 455 |
| 14 | 5005 |
| 15 | 50050 |
| 16 | 210210 |
| 17 | 1401400 |
| 18 | 1401400 |
| 19 | 1 |
| 20 | 816 |
| 21 | 18564 |
| 22 | 185640 |
| 23 | 24310 |
| 24 | 4084080 |
| 25 | 13613600 |
| 26 | 2858856 |
| 27 | 85765680 |
| 28 | 285885600 |
| 29 | 190590400 |
| 30 | 1 |
| 31 | 1330 |
| 32 | 54264 |
| 33 | 542640 |
| 34 | 293930 |
| 35 | 24690120 |
| 36 | 82300400 |
| 37 | 32332300 |
| 38 | 135795660 |
| 39 | 2715913200 |
| 40 | 4526522000 |
| 41 | 3802278480 |
| 42 | 38022784800 |
| 43 | 76045569600 |
| 44 | 36212176000 |
[1,1,1,10,1,84,280,1,220,462,9240,15400,1,455, 5005,50050,210210,1401400,1401400,1,816,18564, 185640,24310,4084080,13613600,2858856,85765680, 285885600,190590400,1,1330,54264,542640,293930, 24690120,82300400,32332300,135795660,2715913200, 4526522000,3802278480,38022784800,76045569600, 36212176000] |