The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 28 |
| 2 | 108 |
| 3 | 6902 |
| 4 | 16068 |
| 5 | 30662 |
| 6 | 84662 |
| 7 | 117157 |
| 8 | 175844 |
| 9 | 305804 |
| 10 | 636268 |
| 11 | 760436 |
| 12 | 765402 |
| 13 | 1343537 |
| 14 | 1433493 |
| 15 | 2125253 |
| 16 | 3125825 |
| 17 | 3255917 |
| 18 | 4264947 |
| 19 | 4796654 |
| 20 | 10271188 |
| 21 | 11911557 |
| 22 | 12043892 |
| 23 | 15344303 |
| 24 | 27692262 |
| 25 | 28112662 |
| 26 | 28478708 |
[28,108,6902,16068,30662,84662,117157,175844, 305804,636268,760436,765402,1343537,1433493, 2125253,3125825,3255917,4264947,4796654,10271188, 11911557,12043892,15344303,27692262,28112662, 28478708] |