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| n | a(n) |
|---|---|
| 0 | 11 |
| 1 | 71 |
| 2 | 491 |
| 3 | 3431 |
| 4 | 24011 |
| 5 | 168071 |
| 6 | 1176491 |
| 7 | 8235431 |
| 8 | 57648011 |
| 9 | 403536071 |
| 10 | 2824752491 |
| 11 | 19773267431 |
| 12 | 138412872011 |
| 13 | 968890104071 |
| 14 | 6782230728491 |
| 15 | 47475615099431 |
| 16 | 332329305696011 |
| 17 | 2326305139872071 |
| 18 | 16284135979104491 |
| 19 | 113988951853731431 |
[11,71,491,3431,24011,168071,1176491,8235431, 57648011,403536071,2824752491,19773267431, 138412872011,968890104071,6782230728491, 47475615099431,332329305696011,2326305139872071, 16284135979104491,113988951853731431] |