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) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 4 |
| 9 | 0 |
| 10 | 9 |
| 11 | 0 |
| 12 | 14 |
| 13 | 0 |
| 14 | 75 |
| 15 | 0 |
| 16 | 155 |
| 17 | 0 |
| 18 | 724 |
| 19 | 0 |
| 20 | 2376 |
| 21 | 0 |
| 22 | 6900 |
| 23 | 0 |
| 24 | 26937 |
| 25 | 0 |
| 26 | 92823 |
| 27 | 0 |
| 28 | 326942 |
| 29 | 0 |
| 30 | 1156399 |
| 31 | 0 |
| 32 | 3960856 |
| 33 | 0 |
| 34 | 14320442 |
| 35 | 0 |
| 36 | 53136802 |
| 37 | 0 |
| 38 | 190397836 |
| 39 | 0 |
| 40 | 706309816 |
| 41 | 0 |
| 42 | 2596474887 |
| 43 | 0 |
| 44 | 9540434672 |
| 45 | 0 |
| 46 | 35480735090 |
| 47 | 0 |
| 48 | 132003300757 |
| 49 | 0 |
[0,0,0,1,0,0,0,4,0,9,0,14,0,75,0,155,0,724,0,2376, 0,6900,0,26937,0,92823,0,326942,0,1156399,0, 3960856,0,14320442,0,53136802,0,190397836,0, 706309816,0,2596474887,0,9540434672,0,35480735090, 0,132003300757,0] |