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 | 0 |
| 5 | 1 |
| 6 | 0 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 3 |
| 11 | 2 |
| 12 | 3 |
| 13 | 4 |
| 14 | 4 |
| 15 | 7 |
| 16 | 6 |
| 17 | 9 |
| 18 | 10 |
| 19 | 11 |
| 20 | 16 |
| 21 | 15 |
| 22 | 20 |
| 23 | 23 |
| 24 | 25 |
| 25 | 32 |
| 26 | 34 |
| 27 | 41 |
| 28 | 47 |
| 29 | 52 |
| 30 | 63 |
| 31 | 68 |
| 32 | 80 |
| 33 | 90 |
| 34 | 101 |
| 35 | 116 |
| 36 | 129 |
| 37 | 147 |
| 38 | 166 |
| 39 | 184 |
| 40 | 210 |
| 41 | 232 |
| 42 | 262 |
| 43 | 292 |
| 44 | 326 |
| 45 | 363 |
| 46 | 405 |
| 47 | 450 |
| 48 | 501 |
| 49 | 554 |
| 50 | 617 |
| 51 | 681 |
| 52 | 756 |
| 53 | 834 |
| 54 | 924 |
| 55 | 1015 |
| 56 | 1125 |
| 57 | 1235 |
| 58 | 1363 |
| 59 | 1498 |
| 60 | 1647 |
| 61 | 1809 |
[0,0,0,0,1,0,1,1,1,3,2,3,4,4,7,6,9,10,11,16,15,20, 23,25,32,34,41,47,52,63,68,80,90,101,116,129,147, 166,184,210,232,262,292,326,363,405,450,501,554, 617,681,756,834,924,1015,1125,1235,1363,1498,1647, 1809] |