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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 24 |
| 3 | 53 |
| 4 | 136 |
| 5 | 568 |
| 6 | 1874 |
| 7 | 5966 |
| 8 | 20721 |
| 9 | 70789 |
| 10 | 236314 |
| 11 | 800508 |
| 12 | 2719171 |
| 13 | 9182336 |
| 14 | 31042624 |
| 15 | 105124746 |
| 16 | 355650499 |
| 17 | 1202909216 |
| 18 | 4070383698 |
| 19 | 13772369477 |
| 20 | 46593368184 |
| 21 | 157641684416 |
| 22 | 533368598291 |
| 23 | 1804551554347 |
| 24 | 6105385347563 |
[8,24,53,136,568,1874,5966,20721,70789,236314, 800508,2719171,9182336,31042624,105124746, 355650499,1202909216,4070383698,13772369477, 46593368184,157641684416,533368598291, 1804551554347,6105385347563] |