login

A009344 as a simple table

na(n)
00
12
2-20
3512
4-27680
52565632
6-363299840
772957489152
8-19722824192000
96905862783107072
10-3040352844189532160
111643816046204280635392
12-1070739118373698870968320
13827017799903621162951770112

[0,2,-20,512,-27680,2565632,-363299840,
 72957489152,-19722824192000,6905862783107072,
 -3040352844189532160,1643816046204280635392,
 -1070739118373698870968320,
 827017799903621162951770112]