The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 19 |
| 1 | 39 |
| 2 | 58 |
| 3 | 155 |
| 4 | 213 |
| 5 | 1220 |
| 6 | 1433 |
| 7 | 4086 |
| 8 | 5519 |
| 9 | 15124 |
| 10 | 580231 |
| 11 | 1175586 |
| 12 | 1755817 |
| 13 | 4687220 |
| 14 | 6443037 |
| 15 | 36902405 |
| 16 | 43345442 |
| 17 | 123593289 |
| 18 | 166938731 |
| 19 | 457470751 |
| 20 | 17550827269 |
| 21 | 35559125289 |
| 22 | 53109952558 |
| 23 | 141779030405 |
| 24 | 194888982963 |
| 25 | 1116223945220 |
| 26 | 1311112928183 |
[19,39,58,155,213,1220,1433,4086,5519,15124, 580231,1175586,1755817,4687220,6443037,36902405, 43345442,123593289,166938731,457470751, 17550827269,35559125289,53109952558,141779030405, 194888982963,1116223945220,1311112928183] |