login

A002423 as a simple table

na(n)
01
1-14
270
3-140
470
528
628
740
870
9140
10308
11728
121820
134760
1412920
1536176
16104006
17305900
18917700
192801400
208684340
2127293640
2286843400
23279409200
24908079900
252978502072
269851968392
2732839894640

[1,-14,70,-140,70,28,28,40,70,140,308,728,1820,
 4760,12920,36176,104006,305900,917700,2801400,
 8684340,27293640,86843400,279409200,908079900,
 2978502072,9851968392,32839894640]