The OEIS is supported by the many generous donors to the OEIS Foundation.
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 155 |
| 3 | 3472 |
| 4 | -26908 |
| 5 | -1611008 |
| 6 | -9293676 |
| 7 | 779148048 |
| 8 | 16205377356 |
| 9 | -247333169664 |
| 10 | -14120417996692 |
| 11 | -45303838226416 |
| 12 | 8941916478235188 |
| 13 | 167663727085727488 |
| 14 | -3759955145349830588 |
| 15 | -178547853102668666736 |
| 16 | -39950690244031860356 |
| 17 | 130719379533522968688640 |
| 18 | 2082045597235784730700220 |
[1,0,155,3472,-26908,-1611008,-9293676,779148048, 16205377356,-247333169664,-14120417996692, -45303838226416,8941916478235188, 167663727085727488,-3759955145349830588, -178547853102668666736,-39950690244031860356, 130719379533522968688640, 2082045597235784730700220] |