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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 8 |
| 6 | 18 |
| 7 | 20 |
| 8 | 24 |
| 9 | 40 |
| 10 | 57 |
| 11 | 84 |
| 12 | 92 |
| 13 | 111 |
| 14 | 135 |
| 15 | 138 |
| 16 | 272 |
| 17 | 423 |
| 18 | 540 |
| 19 | 542 |
| 20 | 1147 |
| 21 | 1246 |
| 22 | 1713 |
| 23 | 2217 |
| 24 | 2767 |
| 25 | 3486 |
| 26 | 30586 |
| 27 | 34183 |
| 28 | 61119 |
| 29 | 113658 |
| 30 | 194668 |
[0,1,2,3,8,18,20,24,40,57,84,92,111,135,138,272, 423,540,542,1147,1246,1713,2217,2767,3486,30586, 34183,61119,113658,194668] |