The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 6 |
| 3 | 26 |
| 4 | 31 |
| 5 | 126 |
| 6 | 156 |
| 7 | 626 |
| 8 | 651 |
| 9 | 781 |
| 10 | 3126 |
| 11 | 3906 |
| 12 | 15626 |
| 13 | 15751 |
| 14 | 16276 |
| 15 | 19531 |
| 16 | 78126 |
| 17 | 97656 |
| 18 | 390626 |
| 19 | 391251 |
| 20 | 406901 |
| 21 | 488281 |
| 22 | 1953126 |
| 23 | 1968876 |
| 24 | 2441406 |
| 25 | 9765626 |
| 26 | 9768751 |
| 27 | 10172526 |
| 28 | 12207031 |
| 29 | 48828126 |
| 30 | 61035156 |
| 31 | 244140626 |
| 32 | 244156251 |
| 33 | 244531876 |
| 34 | 246109501 |
[1,6,26,31,126,156,626,651,781,3126,3906,15626, 15751,16276,19531,78126,97656,390626,391251, 406901,488281,1953126,1968876,2441406,9765626, 9768751,10172526,12207031,48828126,61035156, 244140626,244156251,244531876,246109501] |