The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 11 |
| 3 | 420 |
| 4 | 17129 |
| 5 | 1049895 |
| 6 | 97141022 |
| 7 | 10742461730 |
| 8 | 1370094506209 |
| 9 | 207877406991111 |
| 10 | 36104901766271975 |
| 11 | 7033373902938469086 |
| 12 | 1531762189401458287506 |
| 13 | 368890302956243012167470 |
| 14 | 97283928918541409263666020 |
| 15 | 27895730515878936009534815250 |
[1,1,11,420,17129,1049895,97141022,10742461730, 1370094506209,207877406991111,36104901766271975, 7033373902938469086,1531762189401458287506, 368890302956243012167470, 97283928918541409263666020, 27895730515878936009534815250] |