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 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 1 |
| 5 | 6 |
| 6 | 20 |
| 7 | 46 |
| 8 | 93 |
| 9 | 168 |
| 10 | 280 |
| 11 | 440 |
| 12 | 660 |
| 13 | 953 |
| 14 | 1334 |
| 15 | 1820 |
| 16 | 2426 |
| 17 | 3173 |
| 18 | 4080 |
| 19 | 5168 |
| 20 | 6460 |
| 21 | 7980 |
| 22 | 9753 |
| 23 | 11806 |
| 24 | 14168 |
| 25 | 16866 |
| 26 | 19933 |
| 27 | 23400 |
| 28 | 27300 |
| 29 | 31668 |
| 30 | 36540 |
| 31 | 41953 |
| 32 | 47946 |
| 33 | 54560 |
| 34 | 61834 |
| 35 | 69813 |
| 36 | 78540 |
| 37 | 88060 |
| 38 | 98420 |
| 39 | 109668 |
| 40 | 121853 |
| 41 | 135026 |
| 42 | 149240 |
[0,0,0,0,1,6,20,46,93,168,280,440,660,953,1334, 1820,2426,3173,4080,5168,6460,7980,9753,11806, 14168,16866,19933,23400,27300,31668,36540,41953, 47946,54560,61834,69813,78540,88060,98420,109668, 121853,135026,149240] |