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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 29 |
| 3 | 174 |
| 4 | 1068 |
| 5 | 6656 |
| 6 | 41941 |
| 7 | 266492 |
| 8 | 1704377 |
| 9 | 10957957 |
| 10 | 70757132 |
| 11 | 458544280 |
| 12 | 2980752184 |
| 13 | 19427502404 |
| 14 | 126912484101 |
| 15 | 830740684920 |
| 16 | 5447524136259 |
| 17 | 35778391154159 |
| 18 | 235320088249429 |
| 19 | 1549718825607734 |
| 20 | 10217632324187824 |
| 21 | 67438185088013984 |
| 22 | 445533468374765164 |
[1,5,29,174,1068,6656,41941,266492,1704377, 10957957,70757132,458544280,2980752184, 19427502404,126912484101,830740684920, 5447524136259,35778391154159,235320088249429, 1549718825607734,10217632324187824, 67438185088013984,445533468374765164] |