login

A012621 as a simple table

na(n)
01
10
2-12
3-120
41680
5367680
612095424
7-560956032
8-447394871040
9-8068784621568
10-1294533276204032
116639186363172284416
12-1043706052752056152064
13641443809049086939217920

[1,0,-12,-120,1680,367680,12095424,-560956032,
 -447394871040,-8068784621568,-1294533276204032,
 6639186363172284416,-1043706052752056152064,
 641443809049086939217920]