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| n | a(n) |
|---|---|
| 0 | 5 |
| 1 | 16 |
| 2 | 70 |
| 3 | 346 |
| 4 | 1810 |
| 5 | 9826 |
| 6 | 54850 |
| 7 | 312706 |
| 8 | 1810690 |
| 9 | 10601986 |
| 10 | 62563330 |
| 11 | 371185666 |
| 12 | 2210336770 |
| 13 | 13194911746 |
| 14 | 78901035010 |
| 15 | 472332468226 |
| 16 | 2829699842050 |
| 17 | 16961019183106 |
| 18 | 101697395621890 |
| 19 | 609909495824386 |
| 20 | 3658357463318530 |
| 21 | 21945746733400066 |
| 22 | 131656888214355970 |
| 23 | 789870960541958146 |
[5,16,70,346,1810,9826,54850,312706,1810690, 10601986,62563330,371185666,2210336770, 13194911746,78901035010,472332468226, 2829699842050,16961019183106,101697395621890, 609909495824386,3658357463318530, 21945746733400066,131656888214355970, 789870960541958146] |