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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 14 |
| 4 | 28 |
| 5 | 52 |
| 6 | 94 |
| 7 | 166 |
| 8 | 290 |
| 9 | 502 |
| 10 | 864 |
| 11 | 1480 |
| 12 | 2526 |
| 13 | 4298 |
| 14 | 7294 |
| 15 | 12350 |
| 16 | 20868 |
| 17 | 35196 |
| 18 | 59262 |
| 19 | 99630 |
| 20 | 167258 |
| 21 | 280422 |
| 22 | 469576 |
| 23 | 785424 |
| 24 | 1312318 |
| 25 | 2190482 |
| 26 | 3652854 |
| 27 | 6086126 |
| 28 | 10131820 |
| 29 | 16853572 |
| 30 | 28013854 |
| 31 | 46531510 |
| 32 | 77237906 |
| 33 | 128126038 |
| 34 | 212413104 |
[0,2,14,28,52,94,166,290,502,864,1480,2526,4298, 7294,12350,20868,35196,59262,99630,167258,280422, 469576,785424,1312318,2190482,3652854,6086126, 10131820,16853572,28013854,46531510,77237906, 128126038,212413104] |