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) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 3 |
| 6 | 0 |
| 7 | 1 |
| 8 | 4 |
| 9 | 10 |
| 10 | 0 |
| 11 | 1 |
| 12 | 5 |
| 13 | 15 |
| 14 | 31 |
| 15 | 0 |
| 16 | 1 |
| 17 | 6 |
| 18 | 21 |
| 19 | 52 |
| 20 | 105 |
| 21 | 0 |
| 22 | 1 |
| 23 | 7 |
| 24 | 28 |
| 25 | 80 |
| 26 | 185 |
| 27 | 343 |
| 28 | 0 |
| 29 | 1 |
| 30 | 8 |
| 31 | 36 |
| 32 | 116 |
| 33 | 301 |
| 34 | 644 |
| 35 | 1198 |
| 36 | 0 |
| 37 | 1 |
| 38 | 9 |
| 39 | 45 |
| 40 | 161 |
| 41 | 462 |
| 42 | 1106 |
| 43 | 2304 |
| 44 | 4056 |
| 45 | 0 |
| 46 | 1 |
| 47 | 10 |
| 48 | 55 |
| 49 | 216 |
| 50 | 678 |
| 51 | 1784 |
| 52 | 4088 |
| 53 | 8144 |
| 54 | 14506 |
| 55 | 0 |
| 56 | 1 |
| 57 | 11 |
| 58 | 66 |
| 59 | 282 |
| 60 | 960 |
| 61 | 2744 |
| 62 | 6832 |
| 63 | 14976 |
| 64 | 29482 |
| 65 | 50350 |
[0,0,1,0,1,3,0,1,4,10,0,1,5,15,31,0,1,6,21,52,105, 0,1,7,28,80,185,343,0,1,8,36,116,301,644,1198,0,1, 9,45,161,462,1106,2304,4056,0,1,10,55,216,678, 1784,4088,8144,14506,0,1,11,66,282,960,2744,6832, 14976,29482,50350] |