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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 11 |
| 5 | 31 |
| 6 | 98 |
| 7 | 314 |
| 8 | 1079 |
| 9 | 3773 |
| 10 | 13757 |
| 11 | 50953 |
| 12 | 193733 |
| 13 | 747508 |
| 14 | 2936032 |
| 15 | 11676165 |
| 16 | 47046523 |
| 17 | 191533397 |
| 18 | 787652467 |
| 19 | 3267141729 |
| 20 | 13661333890 |
| 21 | 57536418899 |
| 22 | 243931400240 |
| 23 | 1040437757637 |
| 24 | 4462518009660 |
| 25 | 19238441448717 |
| 26 | 83332985149012 |
| 27 | 362554049022875 |
| 28 | 1583800968801745 |
| 29 | 6945130288469293 |
[1,1,2,4,11,31,98,314,1079,3773,13757,50953, 193733,747508,2936032,11676165,47046523,191533397, 787652467,3267141729,13661333890,57536418899, 243931400240,1040437757637,4462518009660, 19238441448717,83332985149012,362554049022875, 1583800968801745,6945130288469293] |