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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 87 |
| 3 | 219 |
| 4 | 483 |
| 5 | 1011 |
| 6 | 2067 |
| 7 | 4179 |
| 8 | 8403 |
| 9 | 16851 |
| 10 | 33747 |
| 11 | 67539 |
| 12 | 135123 |
| 13 | 270291 |
| 14 | 540627 |
| 15 | 1081299 |
| 16 | 2162643 |
| 17 | 4325331 |
| 18 | 8650707 |
| 19 | 17301459 |
| 20 | 34602963 |
| 21 | 69205971 |
| 22 | 138411987 |
| 23 | 276824019 |
| 24 | 553648083 |
| 25 | 1107296211 |
| 26 | 2214592467 |
| 27 | 4429184979 |
| 28 | 8858370003 |
| 29 | 17716740051 |
| 30 | 35433480147 |
| 31 | 70866960339 |
| 32 | 141733920723 |
| 33 | 283467841491 |
| 34 | 566935683027 |
| 35 | 1133871366099 |
[21,87,219,483,1011,2067,4179,8403,16851,33747, 67539,135123,270291,540627,1081299,2162643, 4325331,8650707,17301459,34602963,69205971, 138411987,276824019,553648083,1107296211, 2214592467,4429184979,8858370003,17716740051, 35433480147,70866960339,141733920723,283467841491, 566935683027,1133871366099] |