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| n | a(n) |
|---|---|
| 1 | 10 |
| 2 | 54 |
| 3 | 582 |
| 4 | 5072 |
| 5 | 37787 |
| 6 | 248473 |
| 7 | 1468544 |
| 8 | 7970617 |
| 9 | 40301719 |
| 10 | 191514623 |
| 11 | 860805160 |
| 12 | 3678654305 |
| 13 | 15012582592 |
| 14 | 58726794268 |
| 15 | 220928309421 |
| 16 | 801577867128 |
| 17 | 2812010911482 |
| 18 | 9559538273794 |
| 19 | 31555053375040 |
| 20 | 101317202514244 |
[10,54,582,5072,37787,248473,1468544,7970617, 40301719,191514623,860805160,3678654305, 15012582592,58726794268,220928309421,801577867128, 2812010911482,9559538273794,31555053375040, 101317202514244] |