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A276990 as a simple table

n a(n)
0 2
1 1
2 2
3 -2
4 20
5 -190
6 3240
7 -90800
8 4174920
9 -313173840
10 38204662320
11 -7564715117520
12 2428250059593600
13 -1262694691720176000
14 1063187432567808662400
15 -1449125250052431355430400
16 3196769645011428154428883200
17 -11412468527893653264760022630400

[2,1,2,-2,20,-190,3240,-90800,4174920,-313173840,
 38204662320,-7564715117520,2428250059593600,
 -1262694691720176000,1063187432567808662400,
 -1449125250052431355430400,
 3196769645011428154428883200,
 -11412468527893653264760022630400]

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Last modified July 21 16:28 EDT 2024. Contains 374475 sequences. (Running on oeis4.)