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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 26 |
| 3 | 76 |
| 4 | 176 |
| 5 | 376 |
| 6 | 776 |
| 7 | 1576 |
| 8 | 3176 |
| 9 | 6376 |
| 10 | 12776 |
| 11 | 25576 |
| 12 | 51176 |
| 13 | 102376 |
| 14 | 204776 |
| 15 | 409576 |
| 16 | 819176 |
| 17 | 1638376 |
| 18 | 3276776 |
| 19 | 6553576 |
| 20 | 13107176 |
| 21 | 26214376 |
| 22 | 52428776 |
| 23 | 104857576 |
| 24 | 209715176 |
| 25 | 419430376 |
| 26 | 838860776 |
| 27 | 1677721576 |
| 28 | 3355443176 |
| 29 | 6710886376 |
| 30 | 13421772776 |
| 31 | 26843545576 |
[1,26,76,176,376,776,1576,3176,6376,12776,25576, 51176,102376,204776,409576,819176,1638376,3276776, 6553576,13107176,26214376,52428776,104857576, 209715176,419430376,838860776,1677721576, 3355443176,6710886376,13421772776,26843545576] |