The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 13 |
| 3 | 190 |
| 4 | 4045 |
| 5 | 116746 |
| 6 | 4251289 |
| 7 | 187255174 |
| 8 | 9684799961 |
| 9 | 575477786674 |
| 10 | 38638577549701 |
| 11 | 2893159369162030 |
| 12 | 239045577899472997 |
| 13 | 21604942464613062010 |
| 14 | 2120362938300115706513 |
| 15 | 224568728344893756230326 |
| 16 | 25529660577970226603535793 |
| 17 | 3100816199696659908092912866 |
[1,2,13,190,4045,116746,4251289,187255174, 9684799961,575477786674,38638577549701, 2893159369162030,239045577899472997, 21604942464613062010,2120362938300115706513, 224568728344893756230326, 25529660577970226603535793, 3100816199696659908092912866] |