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 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 4 |
| 9 | 4 |
| 10 | 18 |
| 11 | 48 |
| 12 | 100 |
| 13 | 294 |
| 14 | 648 |
| 15 | 1584 |
| 16 | 3840 |
| 17 | 8820 |
| 18 | 21168 |
| 19 | 49284 |
| 20 | 115248 |
| 21 | 270400 |
| 22 | 628660 |
| 23 | 1468548 |
| 24 | 3420150 |
| 25 | 7960000 |
| 26 | 18539400 |
| 27 | 43120350 |
| 28 | 100328400 |
| 29 | 233365440 |
| 30 | 542672640 |
| 31 | 1262045880 |
| 32 | 2934442944 |
| 33 | 6822962664 |
| 34 | 15863704528 |
| 35 | 36881698048 |
| 36 | 85746672900 |
| 37 | 199347278724 |
| 38 | 463445232298 |
[0,0,0,0,0,0,0,0,4,4,18,48,100,294,648,1584,3840, 8820,21168,49284,115248,270400,628660,1468548, 3420150,7960000,18539400,43120350,100328400, 233365440,542672640,1262045880,2934442944, 6822962664,15863704528,36881698048,85746672900, 199347278724,463445232298] |