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| n | a(n) |
|---|---|
| 1 | 12858 |
| 2 | 56676 |
| 3 | 114512 |
| 4 | 262200 |
| 5 | 521785 |
| 6 | 1081183 |
| 7 | 2129846 |
| 8 | 4324677 |
| 9 | 8753870 |
| 10 | 18288333 |
| 11 | 38813329 |
| 12 | 84501947 |
| 13 | 186769920 |
| 14 | 419036143 |
| 15 | 948331795 |
| 16 | 2161174028 |
| 17 | 4944248898 |
| 18 | 11342696102 |
| 19 | 26060422110 |
| 20 | 59935245973 |
| 21 | 137914961855 |
[12858,56676,114512,262200,521785,1081183,2129846, 4324677,8753870,18288333,38813329,84501947, 186769920,419036143,948331795,2161174028, 4944248898,11342696102,26060422110,59935245973, 137914961855] |