| 0, 2, 40, 602, 8080, 102002, 1240120, 14704202, 171312160, 1970527202, 22450640200, 253930611002, 2855998840240, 31980846315602, 356873041128280, 3971357037321002, 44096709674720320, 488769846799627202, 5409822678195232360, 59808238730741554202
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