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A127137 as a simple table

n a(n)
0 1
1 1
2 -2
3 -5
4 12
5 43
6 -120
7 -531
8 1680
9 8601
10 -30240
11 -172965
12 665280
13 4161555
14 -17297280
15 -116658675
16 518918400
17 3735104625
18 -17643225600
19 -134498225925
20 670442572800
21 5380583766075
22 -28158588057600
23 -236759435017875
24 1295295050649600
25 11364769115001225
26 -64764752532480000

[1,1,-2,-5,12,43,-120,-531,1680,8601,-30240,
 -172965,665280,4161555,-17297280,-116658675,
 518918400,3735104625,-17643225600,-134498225925,
 670442572800,5380583766075,-28158588057600,
 -236759435017875,1295295050649600,
 11364769115001225,-64764752532480000]

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Last modified January 27 17:58 EST 2020. Contains 331296 sequences. (Running on oeis4.)