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| n | a(n) |
|---|---|
| 0 | 28 |
| 1 | 57 |
| 2 | 142 |
| 3 | 199 |
| 4 | 1137 |
| 5 | 1336 |
| 6 | 2473 |
| 7 | 3809 |
| 8 | 6282 |
| 9 | 85475 |
| 10 | 91757 |
| 11 | 177232 |
| 12 | 268989 |
| 13 | 446221 |
| 14 | 2500094 |
| 15 | 2946315 |
| 16 | 8392724 |
| 17 | 19731763 |
| 18 | 1113371452 |
| 19 | 2246474667 |
| 20 | 5606320786 |
| 21 | 7852795453 |
| 22 | 44870298051 |
| 23 | 52723093504 |
[28,57,142,199,1137,1336,2473,3809,6282,85475, 91757,177232,268989,446221,2500094,2946315, 8392724,19731763,1113371452,2246474667,5606320786, 7852795453,44870298051,52723093504] |