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| n | a(n) |
|---|---|
| 1 | 76 |
| 2 | 528 |
| 3 | 4898 |
| 4 | 38688 |
| 5 | 269638 |
| 6 | 1873728 |
| 7 | 13349904 |
| 8 | 94039306 |
| 9 | 656071804 |
| 10 | 4575740208 |
| 11 | 32015699522 |
| 12 | 223804093392 |
| 13 | 1563835045222 |
| 14 | 10928290592736 |
| 15 | 76414449902016 |
| 16 | 534330839601994 |
| 17 | 3737091593822380 |
| 18 | 26139191772693840 |
| 19 | 182862036532384610 |
[76,528,4898,38688,269638,1873728,13349904, 94039306,656071804,4575740208,32015699522, 223804093392,1563835045222,10928290592736, 76414449902016,534330839601994,3737091593822380, 26139191772693840,182862036532384610] |