A009270 - OEIS

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A009270 as a simple table

n	a(n)
0	1
1	2
2	0
3	-98
4	1400
5	10442
6	-2400420
7	182874382
8	-11026390960
9	272975496722
10	101146071584580
11	-35170244758056938
12	8878370234261147000
13	-2024456851681157735398
14	406854219864771946133100

[1,2,0,-98,1400,10442,-2400420,182874382, -11026390960,272975496722,101146071584580, -35170244758056938,8878370234261147000, -2024456851681157735398,406854219864771946133100]