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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 6 |
| 4 | 18 |
| 5 | 46 |
| 6 | 101 |
| 7 | 197 |
| 8 | 351 |
| 9 | 583 |
| 10 | 916 |
| 11 | 1376 |
| 12 | 1992 |
| 13 | 2796 |
| 14 | 3823 |
| 15 | 5111 |
| 16 | 6701 |
| 17 | 8637 |
| 18 | 10966 |
| 19 | 13738 |
| 20 | 17006 |
| 21 | 20826 |
| 22 | 25257 |
| 23 | 30361 |
| 24 | 36203 |
| 25 | 42851 |
| 26 | 50376 |
| 27 | 58852 |
| 28 | 68356 |
| 29 | 78968 |
| 30 | 90771 |
| 31 | 103851 |
| 32 | 118297 |
| 33 | 134201 |
| 34 | 151658 |
| 35 | 170766 |
| 36 | 191626 |
| 37 | 214342 |
| 38 | 239021 |
| 39 | 265773 |
| 40 | 294711 |
[1,2,6,18,46,101,197,351,583,916,1376,1992,2796, 3823,5111,6701,8637,10966,13738,17006,20826,25257, 30361,36203,42851,50376,58852,68356,78968,90771, 103851,118297,134201,151658,170766,191626,214342, 239021,265773,294711] |