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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 13 |
| 2 | 377 |
| 3 | 10946 |
| 4 | 317811 |
| 5 | 9227465 |
| 6 | 267914296 |
| 7 | 7778742049 |
| 8 | 225851433717 |
| 9 | 6557470319842 |
| 10 | 190392490709135 |
| 11 | 5527939700884757 |
| 12 | 160500643816367088 |
| 13 | 4660046610375530309 |
| 14 | 135301852344706746049 |
| 15 | 3928413764606871165730 |
[0,13,377,10946,317811,9227465,267914296, 7778742049,225851433717,6557470319842, 190392490709135,5527939700884757, 160500643816367088,4660046610375530309, 135301852344706746049,3928413764606871165730] |