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| n | a(n) |
|---|---|
| 0 | 11 |
| 1 | 57 |
| 2 | 331 |
| 3 | 1929 |
| 4 | 11243 |
| 5 | 65529 |
| 6 | 381931 |
| 7 | 2226057 |
| 8 | 12974411 |
| 9 | 75620409 |
| 10 | 440748043 |
| 11 | 2568867849 |
| 12 | 14972459051 |
| 13 | 87265886457 |
| 14 | 508622859691 |
| 15 | 2964471271689 |
| 16 | 17278204770443 |
| 17 | 100704757350969 |
| 18 | 586950339335371 |
| 19 | 3420997278661257 |
| 20 | 19939033332632171 |
| 21 | 116213202717131769 |
[11,57,331,1929,11243,65529,381931,2226057, 12974411,75620409,440748043,2568867849, 14972459051,87265886457,508622859691, 2964471271689,17278204770443,100704757350969, 586950339335371,3420997278661257, 19939033332632171,116213202717131769] |