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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 12 |
| 3 | 27 |
| 4 | 115 |
| 5 | 252 |
| 6 | 1004 |
| 7 | 2013 |
| 8 | 4031 |
| 9 | 16307 |
| 10 | 32631 |
| 11 | 65279 |
| 12 | 261375 |
| 13 | 524270 |
| 14 | 2096110 |
| 15 | 4194253 |
| 16 | 8386527 |
| 17 | 16773119 |
| 18 | 67096575 |
| 19 | 134217659 |
| 20 | 536854459 |
| 21 | 1073741623 |
| 22 | 2147450751 |
| 23 | 4294901759 |
| 24 | 17179672575 |
| 25 | 34359737599 |
| 26 | 137438690559 |
| 27 | 274877382143 |
| 28 | 549754765311 |
| 29 | 2199022205950 |
| 30 | 4398044412927 |
| 31 | 8796093022189 |
| 32 | 35184367894509 |
| 33 | 70368744175567 |
[2,12,27,115,252,1004,2013,4031,16307,32631,65279, 261375,524270,2096110,4194253,8386527,16773119, 67096575,134217659,536854459,1073741623, 2147450751,4294901759,17179672575,34359737599, 137438690559,274877382143,549754765311, 2199022205950,4398044412927,8796093022189, 35184367894509,70368744175567] |