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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 7 |
| 7 | 23 |
| 8 | 65 |
| 9 | 167 |
| 10 | 418 |
| 11 | 1078 |
| 12 | 2927 |
| 13 | 8261 |
| 14 | 23677 |
| 15 | 67917 |
| 16 | 194401 |
| 17 | 557097 |
| 18 | 1604805 |
| 19 | 4655373 |
| 20 | 13592002 |
| 21 | 39875297 |
| 22 | 117379888 |
| 23 | 346445156 |
| 24 | 1025077295 |
| 25 | 3040774879 |
| 26 | 9043131251 |
| 27 | 26958950829 |
| 28 | 80545589421 |
| 29 | 241122613367 |
| 30 | 723125785251 |
| 31 | 2172271809579 |
| 32 | 6535785964961 |
| 33 | 19693769446456 |
| 34 | 59425319779021 |
| 35 | 179551868445081 |
| 36 | 543187254954865 |
| 37 | 1645200904479900 |
[1,1,1,1,2,7,23,65,167,418,1078,2927,8261,23677, 67917,194401,557097,1604805,4655373,13592002, 39875297,117379888,346445156,1025077295, 3040774879,9043131251,26958950829,80545589421, 241122613367,723125785251,2172271809579, 6535785964961,19693769446456,59425319779021, 179551868445081,543187254954865,1645200904479900] |