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| n | a(n) |
|---|---|
| 3 | 0 |
| 4 | 1 |
| 5 | 4 |
| 6 | 9 |
| 7 | 12 |
| 8 | 25 |
| 9 | 60 |
| 10 | 121 |
| 11 | 220 |
| 12 | 441 |
| 13 | 924 |
| 14 | 1849 |
| 15 | 3612 |
| 16 | 7225 |
| 17 | 14620 |
| 18 | 29241 |
| 19 | 58140 |
| 20 | 116281 |
| 21 | 233244 |
| 22 | 466489 |
| 23 | 931612 |
| 24 | 1863225 |
| 25 | 3729180 |
| 26 | 7458361 |
| 27 | 14911260 |
| 28 | 29822521 |
| 29 | 59655964 |
| 30 | 119311929 |
| 31 | 238602012 |
| 32 | 477204025 |
| 33 | 954451740 |
| 34 | 1908903481 |
| 35 | 3817719580 |
[0,1,4,9,12,25,60,121,220,441,924,1849,3612,7225, 14620,29241,58140,116281,233244,466489,931612, 1863225,3729180,7458361,14911260,29822521, 59655964,119311929,238602012,477204025,954451740, 1908903481,3817719580] |