The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 1039 |
| 3 | 4003 |
| 4 | 27793 |
| 5 | 151969 |
| 6 | 177967 |
| 7 | 238531 |
| 8 | 397963 |
| 9 | 555589 |
| 10 | 750151 |
| 11 | 902299 |
| 12 | 2260723 |
| 13 | 2910907 |
| 14 | 5055487 |
| 15 | 6145159 |
| 16 | 12992251 |
| 17 | 14480437 |
| 18 | 21567181 |
| 19 | 26609239 |
| 20 | 31510387 |
| 21 | 37948021 |
| 22 | 40955767 |
| 23 | 46314757 |
| 24 | 48582841 |
| 25 | 106833877 |
| 26 | 110778121 |
| 27 | 176591617 |
[13,1039,4003,27793,151969,177967,238531,397963, 555589,750151,902299,2260723,2910907,5055487, 6145159,12992251,14480437,21567181,26609239, 31510387,37948021,40955767,46314757,48582841, 106833877,110778121,176591617] |