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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 59 |
| 3 | 113 |
| 4 | 284 |
| 5 | 518 |
| 6 | 1796 |
| 7 | 3449 |
| 8 | 13001 |
| 9 | 33157 |
| 10 | 125582 |
| 11 | 347073 |
| 12 | 1750397 |
| 13 | 4967495 |
| 14 | 26187751 |
| 15 | 100593004 |
| 16 | 556134332 |
| 17 | 2202434132 |
| 18 | 16364033894 |
| 19 | 67618894318 |
| 20 | 527057394363 |
| 21 | 2923317994023 |
| 22 | 23673541188119 |
| 23 | 137414022400841 |
[1,2,59,113,284,518,1796,3449,13001,33157,125582, 347073,1750397,4967495,26187751,100593004, 556134332,2202434132,16364033894,67618894318, 527057394363,2923317994023,23673541188119, 137414022400841] |