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| n | a(n) |
|---|---|
| 1 | 40 |
| 2 | 75 |
| 3 | 193 |
| 4 | 337 |
| 5 | 582 |
| 6 | 1350 |
| 7 | 2732 |
| 8 | 5037 |
| 9 | 10549 |
| 10 | 21615 |
| 11 | 41842 |
| 12 | 84846 |
| 13 | 172576 |
| 14 | 341567 |
| 15 | 686447 |
| 16 | 1387291 |
| 17 | 2770696 |
| 18 | 5557618 |
| 19 | 11190652 |
| 20 | 22426331 |
| 21 | 44981821 |
| 22 | 90410789 |
| 23 | 181399432 |
| 24 | 363944476 |
| 25 | 730917000 |
| 26 | 1467035943 |
| 27 | 2944001797 |
| 28 | 5910524039 |
[40,75,193,337,582,1350,2732,5037,10549,21615, 41842,84846,172576,341567,686447,1387291,2770696, 5557618,11190652,22426331,44981821,90410789, 181399432,363944476,730917000,1467035943, 2944001797,5910524039] |