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| n | a(n) |
|---|---|
| 1 | 24 |
| 2 | 80 |
| 3 | 246 |
| 4 | 716 |
| 5 | 2046 |
| 6 | 5782 |
| 7 | 16184 |
| 8 | 45312 |
| 9 | 126250 |
| 10 | 353302 |
| 11 | 986696 |
| 12 | 2770910 |
| 13 | 7777304 |
| 14 | 21945496 |
| 15 | 61932032 |
| 16 | 175572572 |
| 17 | 497905408 |
| 18 | 1417135306 |
| 19 | 4034892052 |
| 20 | 11520180346 |
| 21 | 32901609502 |
| 22 | 94162093264 |
| 23 | 269546074004 |
| 24 | 772772054834 |
[24,80,246,716,2046,5782,16184,45312,126250, 353302,986696,2770910,7777304,21945496,61932032, 175572572,497905408,1417135306,4034892052, 11520180346,32901609502,94162093264,269546074004, 772772054834] |