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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 4 |
| 3 | 12 |
| 4 | 16 |
| 5 | 54 |
| 6 | 73 |
| 7 | 221 |
| 8 | 299 |
| 9 | 828 |
| 10 | 1224 |
| 11 | 3342 |
| 12 | 4913 |
| 13 | 12491 |
| 14 | 18444 |
| 15 | 56096 |
| 16 | 74802 |
| 17 | 206283 |
| 18 | 321164 |
| 19 | 856464 |
| 20 | 1259546 |
| 21 | 3179175 |
| 22 | 4753386 |
| 23 | 14328799 |
| 24 | 19395630 |
| 25 | 52554865 |
| 26 | 82448651 |
| 27 | 220148700 |
| 28 | 320915616 |
| 29 | 816844006 |
| 30 | 1221202009 |
| 31 | 3660510691 |
| 32 | 4944104976 |
| 33 | 13451990320 |
[1,3,4,12,16,54,73,221,299,828,1224,3342,4913, 12491,18444,56096,74802,206283,321164,856464, 1259546,3179175,4753386,14328799,19395630, 52554865,82448651,220148700,320915616,816844006, 1221202009,3660510691,4944104976,13451990320] |