The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 142 |
| 2 | 71 |
| 3 | 3338 |
| 4 | 1669 |
| 5 | 78444 |
| 6 | 39222 |
| 7 | 19611 |
| 8 | 921718 |
| 9 | 460859 |
| 10 | 21660374 |
| 11 | 10830187 |
| 12 | 509018790 |
| 13 | 254509395 |
| 14 | 11961941566 |
| 15 | 5980970783 |
| 16 | 281105626802 |
| 17 | 140552813401 |
| 18 | 6605982229848 |
| 19 | 3302991114924 |
| 20 | 1651495557462 |
[3,142,71,3338,1669,78444,39222,19611,921718, 460859,21660374,10830187,509018790,254509395, 11961941566,5980970783,281105626802,140552813401, 6605982229848,3302991114924,1651495557462] |