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 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 0 |
| 6 | 1 |
| 7 | 3 |
| 8 | 3 |
| 9 | 0 |
| 10 | 1 |
| 11 | 6 |
| 12 | 15 |
| 13 | 15 |
| 14 | 0 |
| 15 | 1 |
| 16 | 10 |
| 17 | 45 |
| 18 | 105 |
| 19 | 105 |
| 20 | 0 |
| 21 | 1 |
| 22 | 15 |
| 23 | 105 |
| 24 | 420 |
| 25 | 945 |
| 26 | 945 |
| 27 | 0 |
| 28 | 1 |
| 29 | 21 |
| 30 | 210 |
| 31 | 1260 |
| 32 | 4725 |
| 33 | 10395 |
| 34 | 10395 |
| 35 | 0 |
| 36 | 1 |
| 37 | 28 |
| 38 | 378 |
| 39 | 3150 |
| 40 | 17325 |
| 41 | 62370 |
| 42 | 135135 |
| 43 | 135135 |
| 44 | 0 |
| 45 | 1 |
| 46 | 36 |
| 47 | 630 |
| 48 | 6930 |
| 49 | 51975 |
| 50 | 270270 |
| 51 | 945945 |
| 52 | 2027025 |
| 53 | 2027025 |
| 54 | 0 |
[0,1,0,1,1,0,1,3,3,0,1,6,15,15,0,1,10,45,105,105, 0,1,15,105,420,945,945,0,1,21,210,1260,4725,10395, 10395,0,1,28,378,3150,17325,62370,135135,135135,0, 1,36,630,6930,51975,270270,945945,2027025,2027025, 0] |