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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 15 |
| 7 | 136 |
| 8 | 153 |
| 9 | 231 |
| 10 | 741 |
| 11 | 1711 |
| 12 | 11026 |
| 13 | 22366 |
| 14 | 99681 |
| 15 | 104653 |
| 16 | 593505 |
| 17 | 1348903 |
| 18 | 1378630 |
| 19 | 1886653 |
| 20 | 3098805 |
| 21 | 4388203 |
| 22 | 4474536 |
| 23 | 24587578 |
| 24 | 26626753 |
| 25 | 32092066 |
| 26 | 45825951 |
| 27 | 132804253 |
| 28 | 165283471 |
| 29 | 197239591 |
| 30 | 355657785 |
| 31 | 498727153 |
| 32 | 866008153 |
| 33 | 1074091726 |
| 34 | 1144165366 |
[0,1,3,6,10,15,136,153,231,741,1711,11026,22366, 99681,104653,593505,1348903,1378630,1886653, 3098805,4388203,4474536,24587578,26626753, 32092066,45825951,132804253,165283471,197239591, 355657785,498727153,866008153,1074091726, 1144165366] |