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| n | a(n) |
|---|---|
| 5 | 1 |
| 6 | 1 |
| 7 | 4 |
| 8 | 9 |
| 9 | 28 |
| 10 | 71 |
| 11 | 198 |
| 12 | 521 |
| 13 | 1418 |
| 14 | 3773 |
| 15 | 10153 |
| 16 | 27114 |
| 17 | 72705 |
| 18 | 194531 |
| 19 | 521447 |
| 20 | 1397482 |
| 21 | 3749836 |
| 22 | 10067417 |
| 23 | 27057233 |
| 24 | 72779710 |
| 25 | 195963184 |
| 26 | 528127752 |
| 27 | 1424707167 |
| 28 | 3846943003 |
| 29 | 10397057771 |
| 30 | 28125235102 |
| 31 | 76149287981 |
| 32 | 206351312858 |
| 33 | 559642013499 |
| 34 | 1519019192097 |
[1,1,4,9,28,71,198,521,1418,3773,10153,27114, 72705,194531,521447,1397482,3749836,10067417, 27057233,72779710,195963184,528127752,1424707167, 3846943003,10397057771,28125235102,76149287981, 206351312858,559642013499,1519019192097] |