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A227415 as a simple table

n a(n)
0 0
1 0
2 1
3 2
4 7
5 3
6 9
7 69
8 177
9 60
10 2715
11 4500
12 42975
13 104580
14 91665
15 186795
16 3493665
17 13497435
18 97345395
19 442245825
20 2601636975
21 13003053525
22 70985324025
23 64585694250
24 57891366225
25 3576632909850
26 9411029102475
27 147580842959550
28 476966861546175
29 5708173568847750

[0,0,1,2,7,3,9,69,177,60,2715,4500,42975,104580,
 91665,186795,3493665,13497435,97345395,442245825,
 2601636975,13003053525,70985324025,64585694250,
 57891366225,3576632909850,9411029102475,
 147580842959550,476966861546175,5708173568847750]

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Last modified April 24 04:14 EDT 2024. Contains 371918 sequences. (Running on oeis4.)