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A170904 as a simple table

n a(n)
0 1
1 0
2 0
3 2
4 24
5 572
6 21280
7 1074390
8 70299264
9 5792903144
10 587159944704
11 71822748886440
12 10435273503677440
13 1776780701352504408
14 350461958856515690496
15 79284041282799128098778
16 20392765404792755583221760
17 5917934230798152486136427600
18 1924427226324694427836833857536

[1,0,0,2,24,572,21280,1074390,70299264,5792903144,
 587159944704,71822748886440,10435273503677440,
 1776780701352504408,350461958856515690496,
 79284041282799128098778,
 20392765404792755583221760,
 5917934230798152486136427600,
 1924427226324694427836833857536]

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Last modified April 17 23:03 EDT 2021. Contains 343071 sequences. (Running on oeis4.)