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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 11 |
| 3 | 43 |
| 4 | 182 |
| 5 | 783 |
| 6 | 3498 |
| 7 | 15732 |
| 8 | 72351 |
| 9 | 333779 |
| 10 | 1562617 |
| 11 | 7327464 |
| 12 | 34715725 |
| 13 | 164627999 |
| 14 | 786629414 |
| 15 | 3760854191 |
| 16 | 18084444360 |
| 17 | 86994234392 |
| 18 | 420369148831 |
| 19 | 2031847737290 |
| 20 | 9856242149346 |
| 21 | 47821651708499 |
| 22 | 232704026736014 |
| 23 | 1132557455930221 |
| 24 | 5525341192048507 |
| 25 | 26960333594715805 |
| 26 | 131813633127893235 |
[1,3,11,43,182,783,3498,15732,72351,333779, 1562617,7327464,34715725,164627999,786629414, 3760854191,18084444360,86994234392,420369148831, 2031847737290,9856242149346,47821651708499, 232704026736014,1132557455930221,5525341192048507, 26960333594715805,131813633127893235] |