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A055024 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 0
9 0
10 2
11 54
12 717
13 6836
14 53696
15 371464
16 2349981
17 13915712
18 78331106
19 423642906
20 2218481677
21 11313458780
22 56431232688
23 276253783984
24 1330866576164
25 6323282609184
26 29682658858324
27 137864087593740

[0,0,0,0,0,0,0,0,0,0,2,54,717,6836,53696,371464,
 2349981,13915712,78331106,423642906,2218481677,
 11313458780,56431232688,276253783984,
 1330866576164,6323282609184,29682658858324,
 137864087593740]

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Last modified April 8 21:44 EDT 2020. Contains 333329 sequences. (Running on oeis4.)