The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 4 |
| 6 | 1 |
| 7 | 1 |
| 8 | 15 |
| 9 | 9 |
| 10 | 1 |
| 11 | 1 |
| 12 | 66 |
| 13 | 66 |
| 14 | 16 |
| 15 | 1 |
| 16 | 1 |
| 17 | 365 |
| 18 | 500 |
| 19 | 190 |
| 20 | 25 |
| 21 | 1 |
| 22 | 1 |
| 23 | 2528 |
| 24 | 4215 |
| 25 | 2150 |
| 26 | 435 |
| 27 | 36 |
| 28 | 1 |
| 29 | 1 |
| 30 | 21259 |
| 31 | 40355 |
| 32 | 25235 |
| 33 | 6825 |
| 34 | 861 |
| 35 | 49 |
| 36 | 1 |
| 37 | 1 |
| 38 | 210430 |
| 39 | 438256 |
| 40 | 317632 |
| 41 | 105910 |
| 42 | 17836 |
| 43 | 1540 |
| 44 | 64 |
| 45 | 1 |
| 46 | 1 |
| 47 | 2393769 |
| 48 | 5352534 |
| 49 | 4338264 |
| 50 | 1693734 |
| 51 | 352926 |
| 52 | 40656 |
| 53 | 2556 |
| 54 | 81 |
| 55 | 1 |
[1,1,1,1,4,1,1,15,9,1,1,66,66,16,1,1,365,500,190, 25,1,1,2528,4215,2150,435,36,1,1,21259,40355, 25235,6825,861,49,1,1,210430,438256,317632,105910, 17836,1540,64,1,1,2393769,5352534,4338264,1693734, 352926,40656,2556,81,1] |