The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 14 |
| 3 | 150 |
| 4 | 1536 |
| 5 | 15594 |
| 6 | 158050 |
| 7 | 1601356 |
| 8 | 16223814 |
| 9 | 164366170 |
| 10 | 1665216896 |
| 11 | 16870539234 |
| 12 | 170917714410 |
| 13 | 1731590444316 |
| 14 | 17542976546494 |
| 15 | 177730263461890 |
| 16 | 1800609290091936 |
| 17 | 18242215773029194 |
| 18 | 184814350419581330 |
| 19 | 1872379131238643436 |
| 20 | 18969325721395559574 |
[1,14,150,1536,15594,158050,1601356,16223814, 164366170,1665216896,16870539234,170917714410, 1731590444316,17542976546494,177730263461890, 1800609290091936,18242215773029194, 184814350419581330,1872379131238643436, 18969325721395559574] |