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 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 4 |
| 9 | 5 |
| 10 | 7 |
| 11 | 8 |
| 12 | 10 |
| 13 | 12 |
| 14 | 14 |
| 15 | 16 |
| 16 | 20 |
| 17 | 22 |
| 18 | 26 |
| 19 | 30 |
| 20 | 35 |
| 21 | 40 |
| 22 | 48 |
| 23 | 55 |
| 24 | 65 |
| 25 | 76 |
| 26 | 90 |
| 27 | 105 |
| 28 | 126 |
| 29 | 147 |
| 30 | 175 |
| 31 | 206 |
| 32 | 244 |
| 33 | 286 |
| 34 | 339 |
| 35 | 396 |
| 36 | 467 |
| 37 | 545 |
| 38 | 638 |
| 39 | 741 |
| 40 | 865 |
| 41 | 1000 |
| 42 | 1160 |
| 43 | 1337 |
| 44 | 1543 |
| 45 | 1770 |
| 46 | 2035 |
| 47 | 2325 |
| 48 | 2660 |
| 49 | 3029 |
| 50 | 3451 |
| 51 | 3916 |
| 52 | 4447 |
| 53 | 5029 |
| 54 | 5691 |
| 55 | 6419 |
| 56 | 7242 |
| 57 | 8146 |
| 58 | 9167 |
| 59 | 10286 |
| 60 | 11546 |
| 61 | 12930 |
| 62 | 14481 |
| 63 | 16185 |
[0,0,0,1,1,2,3,4,5,7,8,10,12,14,16,20,22,26,30,35, 40,48,55,65,76,90,105,126,147,175,206,244,286,339, 396,467,545,638,741,865,1000,1160,1337,1543,1770, 2035,2325,2660,3029,3451,3916,4447,5029,5691,6419, 7242,8146,9167,10286,11546,12930,14481,16185] |