The OEIS is supported by the many generous donors to the OEIS Foundation.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 0 |
| 8 | 1 |
| 9 | 0 |
| 10 | 5 |
| 11 | 0 |
| 12 | 18 |
| 13 | 0 |
| 14 | 59 |
| 15 | 0 |
| 16 | 180 |
| 17 | 0 |
| 18 | 576 |
| 19 | 0 |
| 20 | 1993 |
| 21 | 0 |
| 22 | 6864 |
| 23 | 0 |
| 24 | 23804 |
| 25 | 0 |
| 26 | 83796 |
| 27 | 0 |
| 28 | 300913 |
| 29 | 0 |
| 30 | 1066508 |
| 31 | 0 |
| 32 | 3831226 |
| 33 | 0 |
| 34 | 13815422 |
| 35 | 0 |
| 36 | 50187328 |
| 37 | 0 |
| 38 | 183452325 |
| 39 | 0 |
| 40 | 674196751 |
| 41 | 0 |
| 42 | 2485443437 |
| 43 | 0 |
| 44 | 9232423194 |
| 45 | 0 |
| 46 | 34201130579 |
| 47 | 0 |
| 48 | 127197104929 |
| 49 | 0 |
[0,0,0,0,0,1,0,1,0,5,0,18,0,59,0,180,0,576,0,1993, 0,6864,0,23804,0,83796,0,300913,0,1066508,0, 3831226,0,13815422,0,50187328,0,183452325,0, 674196751,0,2485443437,0,9232423194,0,34201130579, 0,127197104929,0] |