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A009395 as a simple table

n a(n)
0 0
1 1
2 1
3 -3
4 -2
5 45
6 -74
7 -1113
8 7288
9 27465
10 -647894
11 1393227
12 59935228
13 -604628115
14 -4418438114
15 143982353967
16 -381525392432
17 -30072901507695
18 405576151229266
19 4636550476777107
20 -187783513074129692
21 514355533864732725

[0,1,1,-3,-2,45,-74,-1113,7288,27465,-647894,
 1393227,59935228,-604628115,-4418438114,
 143982353967,-381525392432,-30072901507695,
 405576151229266,4636550476777107,
 -187783513074129692,514355533864732725]

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Last modified December 5 12:24 EST 2021. Contains 349557 sequences. (Running on oeis4.)