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A226312 as a simple table

n a(n)
0 0
1 2
2 20
3 186
4 1704
5 15510
6 140676
7 1273230
8 11508048
9 103919022
10 937787100
11 8458728630
12 76269112200
13 687496910490
14 6195793616460
15 55827244680930
16 502959206683296
17 4530723835554270
18 40809306881317068
19 367548287590324902
20 3310080578306654520

[0,2,20,186,1704,15510,140676,1273230,11508048,
 103919022,937787100,8458728630,76269112200,
 687496910490,6195793616460,55827244680930,
 502959206683296,4530723835554270,
 40809306881317068,367548287590324902,
 3310080578306654520]

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Last modified May 2 18:24 EDT 2024. Contains 372203 sequences. (Running on oeis4.)