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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 5 |
| 6 | 11 |
| 7 | 11 |
| 8 | 93 |
| 9 | 93 |
| 10 | 193 |
| 11 | 193 |
| 12 | 793 |
| 13 | 793 |
| 14 | 1619 |
| 15 | 1619 |
| 16 | 26333 |
| 17 | 26333 |
| 18 | 53381 |
| 19 | 53381 |
| 20 | 215955 |
| 21 | 215955 |
| 22 | 436109 |
| 23 | 436109 |
| 24 | 3518265 |
| 25 | 3518265 |
| 26 | 7088533 |
| 27 | 7088533 |
| 28 | 28539857 |
| 29 | 28539857 |
| 30 | 57414019 |
[0,0,1,1,5,5,11,11,93,93,193,193,793,793,1619, 1619,26333,26333,53381,53381,215955,215955,436109, 436109,3518265,3518265,7088533,7088533,28539857, 28539857,57414019] |