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A274751 as a simple table
| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 27 |
| 3 | 144 |
| 4 | 813 |
| 5 | 4554 |
| 6 | 25585 |
| 7 | 143634 |
| 8 | 806695 |
| 9 | 4529786 |
| 10 | 25438375 |
| 11 | 142850048 |
| 12 | 802197187 |
| 13 | 4504820208 |
| 14 | 25297392889 |
| 15 | 142060454416 |
| 16 | 797757713921 |
| 17 | 4479903521254 |
| 18 | 25157436233205 |
| 19 | 141274594599246 |
| 20 | 793344420605515 |
[4,27,144,813,4554,25585,143634,806695,4529786, 25438375,142850048,802197187,4504820208, 25297392889,142060454416,797757713921, 4479903521254,25157436233205,141274594599246, 793344420605515] |