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A006913 as a simple table

n a(n)
0 1
1 0
2 632
3 3328
4 18440
5 44032
6 139872
7 236032
8 589576
9 829440
10 1803600
11 2250496
12 4499360
13 5196800
14 9676480
15 10694144
16 18865928
17 19884032
18 34147224
19 34636032
20 57643440
21 57413632
22 92796192
23 90131968
24 143856544
25 136744960
26 213841936
27 201703936
28 309939520

[1,0,632,3328,18440,44032,139872,236032,589576,
 829440,1803600,2250496,4499360,5196800,9676480,
 10694144,18865928,19884032,34147224,34636032,
 57643440,57413632,92796192,90131968,143856544,
 136744960,213841936,201703936,309939520]

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Last modified September 1 05:33 EDT 2024. Contains 375575 sequences. (Running on oeis4.)