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 | 1 |
| 6 | 2 |
| 7 | 0 |
| 8 | 3 |
| 9 | 6 |
| 10 | 14 |
| 11 | 0 |
| 12 | 6 |
| 13 | 10 |
| 14 | 22 |
| 15 | 34 |
| 16 | 0 |
| 17 | 10 |
| 18 | 17 |
| 19 | 36 |
| 20 | 56 |
| 21 | 90 |
| 22 | 0 |
| 23 | 15 |
| 24 | 24 |
| 25 | 49 |
| 26 | 74 |
| 27 | 118 |
| 28 | 154 |
| 29 | 0 |
| 30 | 21 |
| 31 | 34 |
| 32 | 68 |
| 33 | 102 |
| 34 | 161 |
| 35 | 211 |
| 36 | 288 |
| 37 | 0 |
| 38 | 28 |
| 39 | 44 |
| 40 | 87 |
| 41 | 130 |
| 42 | 205 |
| 43 | 268 |
| 44 | 365 |
| 45 | 462 |
| 46 | 0 |
| 47 | 36 |
| 48 | 57 |
| 49 | 111 |
| 50 | 166 |
| 51 | 261 |
| 52 | 341 |
| 53 | 463 |
| 54 | 586 |
| 55 | 742 |
| 56 | 0 |
| 57 | 45 |
| 58 | 70 |
| 59 | 135 |
| 60 | 200 |
| 61 | 313 |
| 62 | 406 |
| 63 | 550 |
| 64 | 694 |
| 65 | 878 |
| 66 | 1038 |
[0,0,0,0,1,2,0,3,6,14,0,6,10,22,34,0,10,17,36,56, 90,0,15,24,49,74,118,154,0,21,34,68,102,161,211, 288,0,28,44,87,130,205,268,365,462,0,36,57,111, 166,261,341,463,586,742,0,45,70,135,200,313,406, 550,694,878,1038] |