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 | 1 |
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 2 |
| 6 | 8 |
| 7 | 2 |
| 8 | 1 |
| 9 | 1 |
| 10 | 6 |
| 11 | 27 |
| 12 | 24 |
| 13 | 27 |
| 14 | 6 |
| 15 | 1 |
| 16 | 1 |
| 17 | 12 |
| 18 | 70 |
| 19 | 132 |
| 20 | 216 |
| 21 | 132 |
| 22 | 70 |
| 23 | 12 |
| 24 | 1 |
| 25 | 1 |
| 26 | 20 |
| 27 | 155 |
| 28 | 480 |
| 29 | 1070 |
| 30 | 1200 |
| 31 | 1070 |
| 32 | 480 |
| 33 | 155 |
| 34 | 20 |
| 35 | 1 |
| 36 | 1 |
| 37 | 30 |
| 38 | 306 |
| 39 | 1370 |
| 40 | 4035 |
| 41 | 6900 |
| 42 | 8840 |
| 43 | 6900 |
| 44 | 4035 |
| 45 | 1370 |
| 46 | 306 |
| 47 | 30 |
| 48 | 1 |
| 49 | 1 |
| 50 | 42 |
| 51 | 553 |
| 52 | 3332 |
| 53 | 12621 |
| 54 | 29750 |
| 55 | 51065 |
| 56 | 58800 |
| 57 | 51065 |
| 58 | 29750 |
| 59 | 12621 |
| 60 | 3332 |
| 61 | 553 |
| 62 | 42 |
| 63 | 1 |
[1,1,0,1,1,2,8,2,1,1,6,27,24,27,6,1,1,12,70,132, 216,132,70,12,1,1,20,155,480,1070,1200,1070,480, 155,20,1,1,30,306,1370,4035,6900,8840,6900,4035, 1370,306,30,1,1,42,553,3332,12621,29750,51065, 58800,51065,29750,12621,3332,553,42,1] |