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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 17 |
| 5 | 37 |
| 6 | 85 |
| 7 | 189 |
| 8 | 471 |
| 9 | 967 |
| 10 | 2033 |
| 11 | 4493 |
| 12 | 10621 |
| 13 | 23461 |
| 14 | 52841 |
| 15 | 127745 |
| 16 | 340473 |
| 17 | 708489 |
| 18 | 1367785 |
| 19 | 2738841 |
| 20 | 5675977 |
| 21 | 12313209 |
| 22 | 27929825 |
| 23 | 66361381 |
| 24 | 162909213 |
| 25 | 361319381 |
| 26 | 780460693 |
| 27 | 1722272781 |
| 28 | 3904263759 |
| 29 | 9528920767 |
| 30 | 24294326763 |
| 31 | 66213009251 |
| 32 | 187941084483 |
| 33 | 395937137667 |
| 34 | 756194730883 |
| 35 | 1395731222259 |
| 36 | 2540709556499 |
| 37 | 4903320997075 |
| 38 | 9814465115099 |
[1,3,7,17,37,85,189,471,967,2033,4493,10621,23461, 52841,127745,340473,708489,1367785,2738841, 5675977,12313209,27929825,66361381,162909213, 361319381,780460693,1722272781,3904263759, 9528920767,24294326763,66213009251,187941084483, 395937137667,756194730883,1395731222259, 2540709556499,4903320997075,9814465115099] |