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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 3 |
| 3 | 30 |
| 4 | 130 |
| 5 | 381 |
| 6 | 884 |
| 7 | 1765 |
| 8 | 3174 |
| 9 | 5285 |
| 10 | 8296 |
| 11 | 12429 |
| 12 | 17930 |
| 13 | 25069 |
| 14 | 34140 |
| 15 | 45461 |
| 16 | 59374 |
| 17 | 76245 |
| 18 | 96464 |
| 19 | 120445 |
| 20 | 148626 |
| 21 | 181469 |
| 22 | 219460 |
| 23 | 263109 |
| 24 | 312950 |
| 25 | 369541 |
| 26 | 433464 |
| 27 | 505325 |
| 28 | 585754 |
| 29 | 675405 |
| 30 | 774956 |
| 31 | 885109 |
| 32 | 1006590 |
| 33 | 1140149 |
| 34 | 1286560 |
[0,3,30,130,381,884,1765,3174,5285,8296,12429, 17930,25069,34140,45461,59374,76245,96464,120445, 148626,181469,219460,263109,312950,369541,433464, 505325,585754,675405,774956,885109,1006590, 1140149,1286560] |