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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 78125 |
| 2 | 4782969 |
| 3 | 62748517 |
| 4 | 410338673 |
| 5 | 1801088541 |
| 6 | 6103515625 |
| 7 | 17249876309 |
| 8 | 42618442977 |
| 9 | 94931877133 |
| 10 | 194754273881 |
| 11 | 373669453125 |
| 12 | 678223072849 |
| 13 | 1174711139837 |
| 14 | 1954897493193 |
| 15 | 3142742836021 |
| 16 | 4902227890625 |
| 17 | 7446353252589 |
| 18 | 11047398519097 |
| 19 | 16048523266853 |
| 20 | 22876792454961 |
[1,78125,4782969,62748517,410338673,1801088541, 6103515625,17249876309,42618442977,94931877133, 194754273881,373669453125,678223072849, 1174711139837,1954897493193,3142742836021, 4902227890625,7446353252589,11047398519097, 16048523266853,22876792454961] |