A024047 - OEIS

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A024047 as a simple table

n	a(n)
0	1
1	3
2	-2032
3	-177083
4	-4194048
5	-48827101
6	-362792960
7	-1977310359
8	-8589869056
9	-31380797465
10	-99998951424
11	-285307476307
12	-742991593472
13	-1792093285173
14	-4049296734208
15	-8648682117551
16	-17587891077120

[1,3,-2032,-177083,-4194048,-48827101,-362792960, -1977310359,-8589869056,-31380797465,-99998951424, -285307476307,-742991593472,-1792093285173, -4049296734208,-8648682117551,-17587891077120]