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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 4 |
| 3 | 9 |
| 4 | 12 |
| 5 | 27 |
| 6 | 50 |
| 7 | 109 |
| 8 | 224 |
| 9 | 471 |
| 10 | 942 |
| 11 | 1773 |
| 12 | 3118 |
| 13 | 4957 |
| 14 | 7038 |
| 15 | 9373 |
| 16 | 16256 |
| 17 | 55461 |
| 18 | 150622 |
| 19 | 346763 |
| 20 | 718972 |
| 21 | 1377101 |
| 22 | 2462220 |
| 23 | 4114987 |
| 24 | 6387718 |
| 25 | 9112455 |
| 26 | 12051830 |
| 27 | 17160117 |
| 28 | 40946860 |
| 29 | 134463917 |
| 30 | 349105370 |
| 31 | 800713921 |
| 32 | 1684145408 |
| 33 | 3297536923 |
| 34 | 6040907554 |
[1,3,4,9,12,27,50,109,224,471,942,1773,3118,4957, 7038,9373,16256,55461,150622,346763,718972, 1377101,2462220,4114987,6387718,9112455,12051830, 17160117,40946860,134463917,349105370,800713921, 1684145408,3297536923,6040907554] |