| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 8 |
| 4 | 25 |
| 5 | 59 |
| 6 | 123 |
| 7 | 229 |
| 8 | 393 |
| 9 | 635 |
| 10 | 976 |
| 11 | 1444 |
| 12 | 2067 |
| 13 | 2877 |
| 14 | 3913 |
| 15 | 5212 |
| 16 | 6821 |
| 17 | 8786 |
| 18 | 11162 |
| 19 | 14003 |
| 20 | 17371 |
| 21 | 21331 |
| 22 | 25953 |
| 23 | 31312 |
| 24 | 37486 |
| 25 | 44560 |
| 26 | 52623 |
| 27 | 61768 |
| 28 | 72094 |
| 29 | 83705 |
| 30 | 96711 |
| 31 | 111227 |
| 32 | 127371 |
| 33 | 145271 |
| 34 | 165056 |
| 35 | 186865 |
| 36 | 210838 |
| 37 | 237126 |
| 38 | 265881 |
[0,0,2,8,25,59,123,229,393,635,976,1444,2067,2877, 3913,5212,6821,8786,11162,14003,17371,21331,25953, 31312,37486,44560,52623,61768,72094,83705,96711, 111227,127371,145271,165056,186865,210838,237126, 265881] |