The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 5 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 7 |
| 11 | 11 |
| 12 | 7 |
| 13 | 13 |
| 14 | 9 |
| 15 | 8 |
| 16 | 16 |
| 17 | 17 |
| 18 | 11 |
| 19 | 19 |
| 20 | 9 |
| 21 | 7 |
| 22 | 13 |
| 23 | 23 |
| 24 | 11 |
| 25 | 25 |
| 26 | 8 |
| 27 | 27 |
| 28 | 11 |
| 29 | 29 |
| 30 | 7 |
| 31 | 31 |
| 32 | 32 |
| 33 | 9 |
| 34 | 19 |
| 35 | 7 |
| 36 | 13 |
| 37 | 37 |
| 38 | 7 |
| 39 | 16 |
| 40 | 13 |
| 41 | 41 |
| 42 | 7 |
| 43 | 43 |
| 44 | 8 |
| 45 | 9 |
| 46 | 25 |
| 47 | 47 |
| 48 | 19 |
| 49 | 49 |
| 50 | 27 |
| 51 | 9 |
| 52 | 17 |
| 53 | 53 |
| 54 | 29 |
| 55 | 16 |
| 56 | 8 |
| 57 | 13 |
| 58 | 31 |
| 59 | 59 |
| 60 | 7 |
| 61 | 61 |
| 62 | 9 |
| 63 | 16 |
| 64 | 64 |
| 65 | 11 |
| 66 | 16 |
| 67 | 67 |
| 68 | 7 |
| 69 | 8 |
| 70 | 9 |
| 71 | 71 |
| 72 | 17 |
| 73 | 73 |
| 74 | 16 |
| 75 | 11 |
| 76 | 23 |
| 77 | 11 |
| 78 | 11 |
| 79 | 79 |
| 80 | 7 |
| 81 | 81 |
[0,2,3,4,5,5,7,8,9,7,11,7,13,9,8,16,17,11,19,9,7, 13,23,11,25,8,27,11,29,7,31,32,9,19,7,13,37,7,16, 13,41,7,43,8,9,25,47,19,49,27,9,17,53,29,16,8,13, 31,59,7,61,9,16,64,11,16,67,7,8,9,71,17,73,16,11, 23,11,11,79,7,81] |