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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 9 |
| 3 | 36 |
| 4 | 114 |
| 5 | 308 |
| 6 | 745 |
| 7 | 1597 |
| 8 | 3194 |
| 9 | 5944 |
| 10 | 10408 |
| 11 | 17408 |
| 12 | 28207 |
| 13 | 43739 |
| 14 | 66091 |
| 15 | 97417 |
| 16 | 139756 |
| 17 | 197048 |
| 18 | 273225 |
| 19 | 370834 |
| 20 | 497159 |
| 21 | 658332 |
| 22 | 859295 |
| 23 | 1109567 |
| 24 | 1420234 |
| 25 | 1795384 |
| 26 | 2253449 |
| 27 | 2806737 |
| 28 | 3464221 |
| 29 | 4246712 |
| 30 | 5179322 |
| 31 | 6262896 |
| 32 | 7537671 |
| 33 | 9025226 |
[2,9,36,114,308,745,1597,3194,5944,10408,17408, 28207,43739,66091,97417,139756,197048,273225, 370834,497159,658332,859295,1109567,1420234, 1795384,2253449,2806737,3464221,4246712,5179322, 6262896,7537671,9025226] |