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 | 0 |
| 2 | 3 |
| 3 | 0 |
| 4 | 3 |
| 5 | 0 |
| 6 | 3 |
| 7 | 9 |
| 8 | 0 |
| 9 | 3 |
| 10 | 9 |
| 11 | 0 |
| 12 | 3 |
| 13 | 18 |
| 14 | 0 |
| 15 | 3 |
| 16 | 18 |
| 17 | 27 |
| 18 | 0 |
| 19 | 3 |
| 20 | 27 |
| 21 | 27 |
| 22 | 0 |
| 23 | 3 |
| 24 | 27 |
| 25 | 54 |
| 26 | 0 |
| 27 | 3 |
| 28 | 36 |
| 29 | 81 |
| 30 | 0 |
| 31 | 3 |
| 32 | 36 |
| 33 | 108 |
| 34 | 81 |
| 35 | 0 |
| 36 | 3 |
| 37 | 45 |
| 38 | 135 |
| 39 | 81 |
| 40 | 0 |
| 41 | 3 |
| 42 | 45 |
| 43 | 189 |
| 44 | 162 |
| 45 | 0 |
| 46 | 3 |
| 47 | 54 |
| 48 | 216 |
| 49 | 243 |
| 50 | 0 |
| 51 | 3 |
| 52 | 54 |
| 53 | 270 |
| 54 | 405 |
| 55 | 0 |
| 56 | 3 |
| 57 | 63 |
| 58 | 324 |
| 59 | 486 |
| 60 | 243 |
| 61 | 0 |
| 62 | 3 |
| 63 | 63 |
| 64 | 378 |
| 65 | 729 |
| 66 | 243 |
| 67 | 0 |
| 68 | 3 |
| 69 | 72 |
| 70 | 432 |
| 71 | 891 |
[1,0,3,0,3,0,3,9,0,3,9,0,3,18,0,3,18,27,0,3,27,27, 0,3,27,54,0,3,36,81,0,3,36,108,81,0,3,45,135,81,0, 3,45,189,162,0,3,54,216,243,0,3,54,270,405,0,3,63, 324,486,243,0,3,63,378,729,243,0,3,72,432,891] |