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| n | a(n) |
|---|---|
| 0 | 28 |
| 1 | 57 |
| 2 | 199 |
| 3 | 256 |
| 4 | 1991 |
| 5 | 4238 |
| 6 | 6229 |
| 7 | 41612 |
| 8 | 89453 |
| 9 | 309971 |
| 10 | 3499134 |
| 11 | 38800445 |
| 12 | 119900469 |
| 13 | 278601383 |
| 14 | 1791508767 |
| 15 | 2070110150 |
| 16 | 5931729067 |
| 17 | 43592213619 |
| 18 | 49523942686 |
| 19 | 192164041677 |
| 20 | 433852026040 |
| 21 | 24487877499917 |
[28,57,199,256,1991,4238,6229,41612,89453,309971, 3499134,38800445,119900469,278601383,1791508767, 2070110150,5931729067,43592213619,49523942686, 192164041677,433852026040,24487877499917] |