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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 225 |
| 3 | 3645 |
| 4 | 281961 |
| 5 | 14082255 |
| 6 | 793041921 |
| 7 | 43142680647 |
| 8 | 2369158188849 |
| 9 | 129763431348327 |
| 10 | 7112485499815809 |
| 11 | 389766441753947727 |
| 12 | 21360486977871231969 |
| 13 | 1170607520117723187375 |
| 14 | 64152453401987618058561 |
[0,225,3645,281961,14082255,793041921,43142680647, 2369158188849,129763431348327,7112485499815809, 389766441753947727,21360486977871231969, 1170607520117723187375,64152453401987618058561] |