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A061180 as a simple table

n a(n)
0 1
1 20
2 190
3 1295
4 7285
5 36122
6 163730
7 693835
8 2790100
9 10758050
10 40075630
11 145052300
12 512347975
13 1772132390
14 6018885570
15 20118711993
16 66306068715
17 215797999830
18 694463680160
19 2212291834405
20 6982976069384

[1,20,190,1295,7285,36122,163730,693835,2790100,
 10758050,40075630,145052300,512347975,1772132390,
 6018885570,20118711993,66306068715,215797999830,
 694463680160,2212291834405,6982976069384]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)