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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 96 |
| 3 | 216 |
| 4 | 600 |
| 5 | 1536 |
| 6 | 4056 |
| 7 | 10584 |
| 8 | 27744 |
| 9 | 72600 |
| 10 | 190104 |
| 11 | 497664 |
| 12 | 1302936 |
| 13 | 3411096 |
| 14 | 8930400 |
| 15 | 23380056 |
| 16 | 61209816 |
| 17 | 160249344 |
| 18 | 419538264 |
| 19 | 1098365400 |
| 20 | 2875557984 |
| 21 | 7528308504 |
| 22 | 19709367576 |
| 23 | 51599794176 |
| 24 | 135090015000 |
| 25 | 353670250776 |
[7,96,216,600,1536,4056,10584,27744,72600,190104, 497664,1302936,3411096,8930400,23380056,61209816, 160249344,419538264,1098365400,2875557984, 7528308504,19709367576,51599794176,135090015000, 353670250776] |