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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 91 |
| 3 | 169 |
| 4 | 485 |
| 5 | 1183 |
| 6 | 1247 |
| 7 | 2047 |
| 8 | 5551 |
| 9 | 11557 |
| 10 | 14111 |
| 11 | 15229 |
| 12 | 17767 |
| 13 | 19909 |
| 14 | 21667 |
| 15 | 23651 |
| 16 | 38503 |
| 17 | 47197 |
| 18 | 49141 |
| 19 | 53131 |
| 20 | 64907 |
| 21 | 70579 |
| 22 | 72581 |
| 23 | 90851 |
| 24 | 100711 |
| 25 | 109061 |
| 26 | 144433 |
| 27 | 146611 |
| 28 | 153553 |
| 29 | 157753 |
| 30 | 158237 |
| 31 | 163831 |
| 32 | 191959 |
| 33 | 204263 |
| 34 | 222529 |
| 35 | 223721 |
[21,91,169,485,1183,1247,2047,5551,11557,14111, 15229,17767,19909,21667,23651,38503,47197,49141, 53131,64907,70579,72581,90851,100711,109061, 144433,146611,153553,157753,158237,163831,191959, 204263,222529,223721] |