The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 23 |
| 2 | 491 |
| 3 | 2039 |
| 4 | 8779 |
| 5 | 27427 |
| 6 | 31991 |
| 7 | 97547 |
| 8 | 131063 |
| 9 | 157207 |
| 10 | 171491 |
| 11 | 821507 |
| 12 | 1257719 |
| 13 | 1371991 |
| 14 | 1556059 |
| 15 | 1620887 |
| 16 | 1972147 |
| 17 | 2819867 |
| 18 | 3114743 |
| 19 | 3650683 |
| 20 | 3764759 |
| 21 | 5619703 |
| 22 | 6083491 |
| 23 | 7263383 |
| 24 | 7812491 |
| 25 | 9410539 |
| 26 | 13231787 |
| 27 | 17643767 |
| 28 | 24918007 |
[23,491,2039,8779,27427,31991,97547,131063,157207, 171491,821507,1257719,1371991,1556059,1620887, 1972147,2819867,3114743,3650683,3764759,5619703, 6083491,7263383,7812491,9410539,13231787,17643767, 24918007] |