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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 4 |
| 3 | 8 |
| 4 | 19 |
| 5 | 36 |
| 6 | 76 |
| 7 | 142 |
| 8 | 272 |
| 9 | 496 |
| 10 | 900 |
| 11 | 1592 |
| 12 | 2784 |
| 13 | 4792 |
| 14 | 8138 |
| 15 | 13688 |
| 16 | 22703 |
| 17 | 37380 |
| 18 | 60838 |
| 19 | 98310 |
| 20 | 157298 |
| 21 | 250162 |
| 22 | 394332 |
| 23 | 618032 |
| 24 | 961512 |
| 25 | 1487563 |
| 26 | 2286610 |
| 27 | 3496776 |
| 28 | 5316666 |
| 29 | 8044598 |
| 30 | 12110538 |
| 31 | 18147166 |
| 32 | 27068692 |
| 33 | 40203306 |
| 34 | 59459998 |
| 35 | 87587428 |
| 36 | 128522850 |
[1,1,4,8,19,36,76,142,272,496,900,1592,2784,4792, 8138,13688,22703,37380,60838,98310,157298,250162, 394332,618032,961512,1487563,2286610,3496776, 5316666,8044598,12110538,18147166,27068692, 40203306,59459998,87587428,128522850] |