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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 2 |
| 5 | 2 |
| 6 | 10 |
| 7 | 9 |
| 8 | 16 |
| 9 | 58 |
| 10 | 98 |
| 11 | 196 |
| 12 | 445 |
| 13 | 1107 |
| 14 | 2566 |
| 15 | 6245 |
| 16 | 15883 |
| 17 | 40199 |
| 18 | 101196 |
| 19 | 262535 |
| 20 | 671260 |
| 21 | 1729534 |
| 22 | 4466241 |
| 23 | 11504745 |
| 24 | 29835299 |
| 25 | 77256496 |
| 26 | 200759467 |
| 27 | 523172455 |
| 28 | 1365186585 |
| 29 | 3572926982 |
| 30 | 9369651786 |
| 31 | 24618108658 |
[0,2,2,10,9,16,58,98,196,445,1107,2566,6245,15883, 40199,101196,262535,671260,1729534,4466241, 11504745,29835299,77256496,200759467,523172455, 1365186585,3572926982,9369651786,24618108658] |