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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 | 12 |
| 4 | 224 |
| 5 | 2096 |
| 6 | 17732 |
| 7 | 160624 |
| 8 | 1498176 |
| 9 | 13404068 |
| 10 | 115123856 |
| 11 | 980282312 |
| 12 | 8327179132 |
| 13 | 70264899456 |
| 14 | 587727020332 |
| 15 | 4882463109244 |
| 16 | 40378339971868 |
| 17 | 332612594766452 |
| 18 | 2729309532474820 |
| 19 | 22316919930250328 |
| 20 | 181922495487675520 |
| 21 | 1479018078159317720 |
[0,0,0,12,224,2096,17732,160624,1498176,13404068, 115123856,980282312,8327179132,70264899456, 587727020332,4882463109244,40378339971868, 332612594766452,2729309532474820, 22316919930250328,181922495487675520, 1479018078159317720] |