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| n | a(n) |
|---|---|
| 1 | 49 |
| 2 | 189 |
| 3 | 812 |
| 4 | 3832 |
| 5 | 19612 |
| 6 | 107863 |
| 7 | 633072 |
| 8 | 3942493 |
| 9 | 25918400 |
| 10 | 178997028 |
| 11 | 1292240106 |
| 12 | 9702655297 |
| 13 | 75375931728 |
| 14 | 602756594266 |
| 15 | 4937514449271 |
| 16 | 41249246950490 |
| 17 | 350098918064990 |
| 18 | 3008960352721543 |
| 19 | 26117176205443005 |
[49,189,812,3832,19612,107863,633072,3942493, 25918400,178997028,1292240106,9702655297, 75375931728,602756594266,4937514449271, 41249246950490,350098918064990,3008960352721543, 26117176205443005] |