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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 15 |
| 3 | 50 |
| 4 | 76 |
| 5 | 203 |
| 6 | 335 |
| 7 | -84 |
| 8 | 2696 |
| 9 | -3011 |
| 10 | -8433 |
| 11 | 130606 |
| 12 | -662348 |
| 13 | 1840439 |
| 14 | 2391823 |
| 15 | -67000872 |
| 16 | 478203152 |
| 17 | -1994884455 |
| 18 | 1669477263 |
| 19 | 56929821514 |
| 20 | -615188031396 |
| 21 | 3794477515715 |
| 22 | -12028579007921 |
| 23 | -50780206459996 |
| 24 | 1172949397939160 |
| 25 | -10766410530747243 |
[0,1,15,50,76,203,335,-84,2696,-3011,-8433,130606, -662348,1840439,2391823,-67000872,478203152, -1994884455,1669477263,56929821514,-615188031396, 3794477515715,-12028579007921,-50780206459996, 1172949397939160,-10766410530747243] |