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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 3 |
| 3 | 10 |
| 4 | 31 |
| 5 | 71 |
| 6 | 171 |
| 7 | 288 |
| 8 | 505 |
| 9 | 985 |
| 10 | 1471 |
| 11 | 2036 |
| 12 | 3455 |
| 13 | 5136 |
| 14 | 8009 |
| 15 | 11376 |
| 16 | 14261 |
| 17 | 17613 |
| 18 | 24073 |
| 19 | 34429 |
| 20 | 60706 |
| 21 | 76196 |
| 22 | 92324 |
| 23 | 108538 |
| 24 | 144947 |
| 25 | 167151 |
| 26 | 201501 |
| 27 | 309115 |
| 28 | 452026 |
| 29 | 543635 |
| 30 | 649137 |
| 31 | 928947 |
| 32 | 1059705 |
| 33 | 1250129 |
| 34 | 1634194 |
| 35 | 1838908 |
| 36 | 2084398 |
| 37 | 2331001 |
| 38 | 2628518 |
[0,0,3,10,31,71,171,288,505,985,1471,2036,3455, 5136,8009,11376,14261,17613,24073,34429,60706, 76196,92324,108538,144947,167151,201501,309115, 452026,543635,649137,928947,1059705,1250129, 1634194,1838908,2084398,2331001,2628518] |