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| n | a(n) |
|---|---|
| 1 | 21 |
| 2 | 30 |
| 3 | 51 |
| 4 | 88 |
| 5 | 128 |
| 6 | 197 |
| 7 | 292 |
| 8 | 457 |
| 9 | 688 |
| 10 | 1058 |
| 11 | 1589 |
| 12 | 2424 |
| 13 | 3651 |
| 14 | 5552 |
| 15 | 8376 |
| 16 | 12709 |
| 17 | 19192 |
| 18 | 29085 |
| 19 | 43952 |
| 20 | 66562 |
| 21 | 100629 |
| 22 | 152332 |
| 23 | 230359 |
| 24 | 348632 |
| 25 | 527296 |
| 26 | 797909 |
| 27 | 1206940 |
| 28 | 1826193 |
| 29 | 2762528 |
| 30 | 4179698 |
| 31 | 6322981 |
| 32 | 9566352 |
| 33 | 14472171 |
| 34 | 21895248 |
[21,30,51,88,128,197,292,457,688,1058,1589,2424, 3651,5552,8376,12709,19192,29085,43952,66562, 100629,152332,230359,348632,527296,797909,1206940, 1826193,2762528,4179698,6322981,9566352,14472171, 21895248] |