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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 10 |
| 7 | 15 |
| 8 | 22 |
| 9 | 33 |
| 10 | 49 |
| 11 | 70 |
| 12 | 102 |
| 13 | 146 |
| 14 | 205 |
| 15 | 290 |
| 16 | 405 |
| 17 | 561 |
| 18 | 779 |
| 19 | 1071 |
| 20 | 1463 |
| 21 | 1999 |
| 22 | 2714 |
| 23 | 3667 |
| 24 | 4946 |
| 25 | 6641 |
| 26 | 8880 |
| 27 | 11848 |
| 28 | 15753 |
| 29 | 20870 |
| 30 | 27586 |
| 31 | 36354 |
| 32 | 47766 |
| 33 | 62621 |
| 34 | 81878 |
| 35 | 106785 |
| 36 | 138975 |
| 37 | 180449 |
| 38 | 233778 |
| 39 | 302270 |
| 40 | 390027 |
| 41 | 502256 |
| 42 | 645603 |
| 43 | 828330 |
| 44 | 1060851 |
[1,1,1,3,4,6,10,15,22,33,49,70,102,146,205,290, 405,561,779,1071,1463,1999,2714,3667,4946,6641, 8880,11848,15753,20870,27586,36354,47766,62621, 81878,106785,138975,180449,233778,302270,390027, 502256,645603,828330,1060851] |