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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 10 |
| 6 | 18 |
| 7 | 23 |
| 8 | 53 |
| 9 | 128 |
| 10 | 194 |
| 11 | 586 |
| 12 | 947 |
| 13 | 2070 |
| 14 | 3667 |
| 15 | 16762 |
| 16 | 33036 |
| 17 | 93402 |
| 18 | 200626 |
| 19 | 445869 |
| 20 | 1517300 |
| 21 | 3715025 |
| 22 | 14526494 |
| 23 | 39369076 |
| 24 | 111448616 |
| 25 | 541299314 |
| 26 | 1713653236 |
| 27 | 5690596129 |
| 28 | 9832997667 |
| 29 | 35075665070 |
| 30 | 131672592907 |
| 31 | 973547058482 |
| 32 | 4162255238584 |
| 33 | 18810021557460 |
[1,2,3,5,10,18,23,53,128,194,586,947,2070,3667, 16762,33036,93402,200626,445869,1517300,3715025, 14526494,39369076,111448616,541299314,1713653236, 5690596129,9832997667,35075665070,131672592907, 973547058482,4162255238584,18810021557460] |