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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 16 |
| 3 | 94 |
| 4 | 386 |
| 5 | 1247 |
| 6 | 3423 |
| 7 | 8342 |
| 8 | 18546 |
| 9 | 38304 |
| 10 | 74451 |
| 11 | 137503 |
| 12 | 243103 |
| 13 | 413858 |
| 14 | 681632 |
| 15 | 1090365 |
| 16 | 1699493 |
| 17 | 2588049 |
| 18 | 3859530 |
| 19 | 5647620 |
| 20 | 8122864 |
| 21 | 11500393 |
| 22 | 16048805 |
| 23 | 22100312 |
| 24 | 30062268 |
| 25 | 40430198 |
| 26 | 53802453 |
| 27 | 70896621 |
| 28 | 92567829 |
| 29 | 119829076 |
| 30 | 153873742 |
| 31 | 196100423 |
[1,3,16,94,386,1247,3423,8342,18546,38304,74451, 137503,243103,413858,681632,1090365,1699493, 2588049,3859530,5647620,8122864,11500393,16048805, 22100312,30062268,40430198,53802453,70896621, 92567829,119829076,153873742,196100423] |