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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 5 |
| 5 | 11 |
| 6 | 15 |
| 7 | 17 |
| 8 | 29 |
| 9 | 59 |
| 10 | 87 |
| 11 | 105 |
| 12 | 125 |
| 13 | 519 |
| 14 | 605 |
| 15 | 1277 |
| 16 | 2201 |
| 17 | 2279 |
| 18 | 3215 |
| 19 | 4251 |
| 20 | 4421 |
| 21 | 9687 |
| 22 | 9939 |
| 23 | 11211 |
| 24 | 19935 |
| 25 | 21699 |
| 26 | 23207 |
| 27 | 44495 |
| 28 | 86241 |
| 29 | 110501 |
| 30 | 132047 |
| 31 | 216089 |
| 32 | 756837 |
| 33 | 859431 |
| 34 | 1257785 |
| 35 | 1398267 |
| 36 | 2976219 |
| 37 | 3021375 |
| 38 | 6972591 |
| 39 | 13466915 |
| 40 | 20996009 |
| 41 | 24036581 |
[0,1,3,5,11,15,17,29,59,87,105,125,519,605,1277, 2201,2279,3215,4251,4421,9687,9939,11211,19935, 21699,23207,44495,86241,110501,132047,216089, 756837,859431,1257785,1398267,2976219,3021375, 6972591,13466915,20996009,24036581] |