The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 5 |
| 5 | 1 |
| 6 | 1 |
| 7 | 21 |
| 8 | 15 |
| 9 | 1 |
| 10 | 1 |
| 11 | 85 |
| 12 | 171 |
| 13 | 35 |
| 14 | 1 |
| 15 | 1 |
| 16 | 341 |
| 17 | 1795 |
| 18 | 871 |
| 19 | 70 |
| 20 | 1 |
| 21 | 1 |
| 22 | 1365 |
| 23 | 18291 |
| 24 | 19215 |
| 25 | 3321 |
| 26 | 126 |
| 27 | 1 |
| 28 | 1 |
| 29 | 5461 |
| 30 | 184275 |
| 31 | 402591 |
| 32 | 135450 |
| 33 | 10377 |
| 34 | 210 |
| 35 | 1 |
| 36 | 1 |
| 37 | 21845 |
| 38 | 1848211 |
| 39 | 8236095 |
| 40 | 5143341 |
| 41 | 716562 |
| 42 | 28017 |
| 43 | 330 |
| 44 | 1 |
| 45 | 1 |
| 46 | 87381 |
| 47 | 18503955 |
| 48 | 166570111 |
| 49 | 188253030 |
| 50 | 45270813 |
| 51 | 3069990 |
| 52 | 67617 |
| 53 | 495 |
| 54 | 1 |
[1,1,1,1,5,1,1,21,15,1,1,85,171,35,1,1,341,1795, 871,70,1,1,1365,18291,19215,3321,126,1,1,5461, 184275,402591,135450,10377,210,1,1,21845,1848211, 8236095,5143341,716562,28017,330,1,1,87381, 18503955,166570111,188253030,45270813,3069990, 67617,495,1] |