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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 27 |
| 3 | 256 |
| 4 | 1325 |
| 5 | 4815 |
| 6 | 13916 |
| 7 | 34272 |
| 8 | 75006 |
| 9 | 149925 |
| 10 | 278905 |
| 11 | 489456 |
| 12 | 818467 |
| 13 | 1314131 |
| 14 | 2038050 |
| 15 | 3067520 |
| 16 | 4497996 |
| 17 | 6445737 |
| 18 | 9050631 |
| 19 | 12479200 |
| 20 | 16927785 |
| 21 | 22625911 |
| 22 | 29839832 |
| 23 | 38876256 |
| 24 | 50086250 |
| 25 | 63869325 |
| 26 | 80677701 |
| 27 | 101020752 |
| 28 | 125469631 |
| 29 | 154662075 |
| 30 | 189307390 |
[0,1,27,256,1325,4815,13916,34272,75006,149925, 278905,489456,818467,1314131,2038050,3067520, 4497996,6445737,9050631,12479200,16927785, 22625911,29839832,38876256,50086250,63869325, 80677701,101020752,125469631,154662075,189307390] |