| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 6 |
| 3 | 13 |
| 4 | 30 |
| 5 | 58 |
| 6 | 120 |
| 7 | 219 |
| 8 | 413 |
| 9 | 730 |
| 10 | 1296 |
| 11 | 2201 |
| 12 | 3766 |
| 13 | 6206 |
| 14 | 10241 |
| 15 | 16500 |
| 16 | 26502 |
| 17 | 41748 |
| 18 | 65600 |
| 19 | 101417 |
| 20 | 156264 |
| 21 | 237741 |
| 22 | 360146 |
| 23 | 539838 |
| 24 | 806030 |
| 25 | 1192365 |
| 26 | 1756766 |
| 27 | 2568418 |
| 28 | 3739724 |
| 29 | 5408247 |
| 30 | 7791474 |
| 31 | 11156601 |
| 32 | 15916288 |
| 33 | 22585112 |
| 34 | 31933166 |
| 35 | 44932450 |
| 36 | 63010688 |
[1,2,6,13,30,58,120,219,413,730,1296,2201,3766, 6206,10241,16500,26502,41748,65600,101417,156264, 237741,360146,539838,806030,1192365,1756766, 2568418,3739724,5408247,7791474,11156601,15916288, 22585112,31933166,44932450,63010688] |