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 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 3 |
| 12 | 3 |
| 13 | 3 |
| 14 | 1 |
| 15 | 1 |
| 16 | 3 |
| 17 | 9 |
| 18 | 9 |
| 19 | 3 |
| 20 | 1 |
| 21 | 1 |
| 22 | 5 |
| 23 | 15 |
| 24 | 45 |
| 25 | 15 |
| 26 | 5 |
| 27 | 1 |
| 28 | 1 |
| 29 | 9 |
| 30 | 45 |
| 31 | 135 |
| 32 | 135 |
| 33 | 45 |
| 34 | 9 |
| 35 | 1 |
| 36 | 1 |
| 37 | 11 |
| 38 | 99 |
| 39 | 495 |
| 40 | 495 |
| 41 | 495 |
| 42 | 99 |
| 43 | 11 |
| 44 | 1 |
| 45 | 1 |
| 46 | 19 |
| 47 | 209 |
| 48 | 1881 |
| 49 | 3135 |
| 50 | 3135 |
| 51 | 1881 |
| 52 | 209 |
| 53 | 19 |
| 54 | 1 |
| 55 | 1 |
| 56 | 29 |
| 57 | 551 |
| 58 | 6061 |
| 59 | 18183 |
| 60 | 30305 |
| 61 | 18183 |
| 62 | 6061 |
| 63 | 551 |
| 64 | 29 |
| 65 | 1 |
[1,1,1,1,1,1,1,1,1,1,1,3,3,3,1,1,3,9,9,3,1,1,5,15, 45,15,5,1,1,9,45,135,135,45,9,1,1,11,99,495,495, 495,99,11,1,1,19,209,1881,3135,3135,1881,209,19,1, 1,29,551,6061,18183,30305,18183,6061,551,29,1] |