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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 10 |
| 3 | 37 |
| 4 | 144 |
| 5 | 571 |
| 6 | 2278 |
| 7 | 9105 |
| 8 | 36412 |
| 9 | 145639 |
| 10 | 582546 |
| 11 | 2330173 |
| 12 | 9320680 |
| 13 | 37282707 |
| 14 | 149130814 |
| 15 | 596523241 |
| 16 | 2386092948 |
| 17 | 9544371775 |
| 18 | 38177487082 |
| 19 | 152709948309 |
| 20 | 610839793216 |
| 21 | 2443359172843 |
| 22 | 9773436691350 |
| 23 | 39093746765377 |
[1,3,10,37,144,571,2278,9105,36412,145639,582546, 2330173,9320680,37282707,149130814,596523241, 2386092948,9544371775,38177487082,152709948309, 610839793216,2443359172843,9773436691350, 39093746765377] |