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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 19 |
| 2 | 113 |
| 3 | 659 |
| 4 | 3841 |
| 5 | 22387 |
| 6 | 130481 |
| 7 | 760499 |
| 8 | 4432513 |
| 9 | 25834579 |
| 10 | 150574961 |
| 11 | 877615187 |
| 12 | 5115116161 |
| 13 | 29813081779 |
| 14 | 173763374513 |
| 15 | 1012767165299 |
| 16 | 5902839617281 |
| 17 | 34404270538387 |
| 18 | 200522783613041 |
| 19 | 1168732431139859 |
[1,19,113,659,3841,22387,130481,760499,4432513, 25834579,150574961,877615187,5115116161, 29813081779,173763374513,1012767165299, 5902839617281,34404270538387,200522783613041, 1168732431139859] |