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A000186 as a simple table

n a(n)
0 1
1 0
2 0
3 2
4 24
5 552
6 21280
7 1073760
8 70299264
9 5792853248
10 587159944704
11 71822743499520
12 10435273503677440
13 1776780700509416448
14 350461958856515690496
15 79284041282622163140608
16 20392765404792755583221760
17 5917934230798104348783083520
18 1924427226324694427836833857536

[1,0,0,2,24,552,21280,1073760,70299264,5792853248,
 587159944704,71822743499520,10435273503677440,
 1776780700509416448,350461958856515690496,
 79284041282622163140608,
 20392765404792755583221760,
 5917934230798104348783083520,
 1924427226324694427836833857536]

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Last modified June 2 20:31 EDT 2024. Contains 373045 sequences. (Running on oeis4.)