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A248102 as a simple table
| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 18 |
| 4 | 24 |
| 5 | 238 |
| 6 | 842 |
| 7 | 4360 |
| 8 | 25900 |
| 9 | 112178 |
| 10 | 613140 |
| 11 | 2941170 |
| 12 | 14789274 |
| 13 | 74895336 |
| 14 | 369603312 |
| 15 | 1866863986 |
| 16 | 9294391952 |
| 17 | 46543456838 |
| 18 | 233028690018 |
| 19 | 1164275409976 |
| 20 | 5830080180396 |
| 21 | 29149585256266 |
| 22 | 145845002931724 |
| 23 | 729627382873090 |
| 24 | 3649578988919810 |
[1,0,0,18,24,238,842,4360,25900,112178,613140, 2941170,14789274,74895336,369603312,1866863986, 9294391952,46543456838,233028690018,1164275409976, 5830080180396,29149585256266,145845002931724, 729627382873090,3649578988919810] |