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| n | a(n) |
|---|---|
| 2 | 1 |
| 3 | 3 |
| 4 | 4 |
| 5 | 15 |
| 6 | 6 |
| 7 | 63 |
| 8 | 64 |
| 9 | 171 |
| 10 | 130 |
| 11 | 1023 |
| 12 | 804 |
| 13 | 4095 |
| 14 | 2380 |
| 15 | 7920 |
| 16 | 16384 |
| 17 | 65535 |
| 18 | 40410 |
| 19 | 262143 |
| 20 | 246640 |
| 21 | 582771 |
| 22 | 695860 |
| 23 | 4194303 |
| 24 | 2884776 |
| 25 | 13455325 |
| 26 | 11576916 |
| 27 | 44739243 |
| 28 | 65924824 |
| 29 | 268435455 |
| 30 | 176422980 |
| 31 | 1073741823 |
| 32 | 1073741824 |
| 33 | 2669774811 |
| 34 | 3128164186 |
| 35 | 11421338075 |
[1,3,4,15,6,63,64,171,130,1023,804,4095,2380,7920, 16384,65535,40410,262143,246640,582771,695860, 4194303,2884776,13455325,11576916,44739243, 65924824,268435455,176422980,1073741823, 1073741824,2669774811,3128164186,11421338075] |