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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 18 |
| 5 | 0 |
| 6 | 0 |
| 7 | 72 |
| 8 | 0 |
| 9 | 240 |
| 10 | 252 |
| 11 | 0 |
| 12 | 0 |
| 13 | 504 |
| 14 | 0 |
| 15 | 0 |
| 16 | 1026 |
| 17 | 0 |
| 18 | 2160 |
| 19 | 1512 |
| 20 | 0 |
| 21 | 0 |
| 22 | 2664 |
| 23 | 0 |
| 24 | 0 |
| 25 | 3528 |
| 26 | 0 |
| 27 | 6720 |
| 28 | 5616 |
| 29 | 0 |
| 30 | 0 |
| 31 | 6552 |
| 32 | 0 |
| 33 | 0 |
| 34 | 9828 |
| 35 | 0 |
| 36 | 17520 |
| 37 | 11232 |
| 38 | 0 |
| 39 | 0 |
| 40 | 16380 |
| 41 | 0 |
| 42 | 0 |
| 43 | 17784 |
| 44 | 0 |
| 45 | 30240 |
| 46 | 24336 |
| 47 | 0 |
| 48 | 0 |
| 49 | 26208 |
| 50 | 0 |
| 51 | 0 |
| 52 | 35532 |
| 53 | 0 |
| 54 | 60480 |
| 55 | 37296 |
| 56 | 0 |
| 57 | 0 |
| 58 | 48780 |
| 59 | 0 |
| 60 | 0 |
| 61 | 50400 |
| 62 | 0 |
[1,0,0,0,18,0,0,72,0,240,252,0,0,504,0,0,1026,0, 2160,1512,0,0,2664,0,0,3528,0,6720,5616,0,0,6552, 0,0,9828,0,17520,11232,0,0,16380,0,0,17784,0, 30240,24336,0,0,26208,0,0,35532,0,60480,37296,0,0, 48780,0,0,50400,0] |