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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 6 |
| 6 | 9 |
| 7 | 13 |
| 8 | 18 |
| 9 | 26 |
| 10 | 37 |
| 11 | 52 |
| 12 | 74 |
| 13 | 105 |
| 14 | 148 |
| 15 | 210 |
| 16 | 297 |
| 17 | 420 |
| 18 | 594 |
| 19 | 840 |
| 20 | 1188 |
| 21 | 1680 |
| 22 | 2376 |
| 23 | 3361 |
| 24 | 4753 |
| 25 | 6722 |
| 26 | 9506 |
| 27 | 13444 |
| 28 | 19013 |
| 29 | 26888 |
| 30 | 38026 |
| 31 | 53777 |
| 32 | 76052 |
| 33 | 107554 |
| 34 | 152105 |
| 35 | 215109 |
| 36 | 304210 |
| 37 | 430218 |
| 38 | 608420 |
| 39 | 860436 |
| 40 | 1216841 |
| 41 | 1720873 |
| 42 | 2433682 |
[1,2,3,4,6,9,13,18,26,37,52,74,105,148,210,297, 420,594,840,1188,1680,2376,3361,4753,6722,9506, 13444,19013,26888,38026,53777,76052,107554,152105, 215109,304210,430218,608420,860436,1216841, 1720873,2433682] |