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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 35 |
| 4 | 155 |
| 5 | 688 |
| 6 | 3163 |
| 7 | 14608 |
| 8 | 68442 |
| 9 | 323007 |
| 10 | 1534140 |
| 11 | 7318363 |
| 12 | 35087119 |
| 13 | 168746710 |
| 14 | 813977051 |
| 15 | 3936697604 |
| 16 | 19082459598 |
| 17 | 92671351366 |
| 18 | 450828322591 |
| 19 | 2196603187071 |
| 20 | 10717007182966 |
| 21 | 52350759519615 |
| 22 | 256013137943151 |
| 23 | 1253242895804371 |
| 24 | 6140494021718587 |
| 25 | 30111953154533101 |
| 26 | 147778132547086164 |
[1,2,9,35,155,688,3163,14608,68442,323007,1534140, 7318363,35087119,168746710,813977051,3936697604, 19082459598,92671351366,450828322591, 2196603187071,10717007182966,52350759519615, 256013137943151,1253242895804371,6140494021718587, 30111953154533101,147778132547086164] |