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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 9 |
| 3 | 36 |
| 4 | 116 |
| 5 | 291 |
| 6 | 687 |
| 7 | 1422 |
| 8 | 2830 |
| 9 | 5260 |
| 10 | 9460 |
| 11 | 16236 |
| 12 | 27324 |
| 13 | 44393 |
| 14 | 70853 |
| 15 | 110453 |
| 16 | 169589 |
| 17 | 255422 |
| 18 | 380162 |
| 19 | 557052 |
| 20 | 807852 |
| 21 | 1157124 |
| 22 | 1642092 |
| 23 | 2305987 |
| 24 | 3213187 |
| 25 | 4436937 |
| 26 | 6083673 |
| 27 | 8277963 |
| 28 | 11192875 |
| 29 | 15032040 |
| 30 | 20075640 |
| 31 | 26650802 |
| 32 | 35200178 |
| 33 | 46245905 |
| 34 | 60476265 |
[0,1,9,36,116,291,687,1422,2830,5260,9460,16236, 27324,44393,70853,110453,169589,255422,380162, 557052,807852,1157124,1642092,2305987,3213187, 4436937,6083673,8277963,11192875,15032040, 20075640,26650802,35200178,46245905,60476265] |