The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 3 |
| 4 | 1 |
| 5 | 9 |
| 6 | 15 |
| 7 | 1 |
| 8 | 21 |
| 9 | 90 |
| 10 | 113 |
| 11 | 1 |
| 12 | 45 |
| 13 | 375 |
| 14 | 1130 |
| 15 | 1153 |
| 16 | 1 |
| 17 | 93 |
| 18 | 1350 |
| 19 | 7345 |
| 20 | 17295 |
| 21 | 15125 |
| 22 | 1 |
| 23 | 189 |
| 24 | 4515 |
| 25 | 39550 |
| 26 | 161420 |
| 27 | 317625 |
| 28 | 245829 |
| 29 | 1 |
| 30 | 381 |
| 31 | 14490 |
| 32 | 192213 |
| 33 | 1210650 |
| 34 | 4023250 |
| 35 | 6883212 |
| 36 | 4815403 |
| 37 | 1 |
| 38 | 765 |
| 39 | 45375 |
| 40 | 878010 |
| 41 | 8014503 |
| 42 | 40020750 |
| 43 | 113572998 |
| 44 | 173354508 |
| 45 | 111308699 |
[1,1,3,1,9,15,1,21,90,113,1,45,375,1130,1153,1,93, 1350,7345,17295,15125,1,189,4515,39550,161420, 317625,245829,1,381,14490,192213,1210650,4023250, 6883212,4815403,1,765,45375,878010,8014503, 40020750,113572998,173354508,111308699] |