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A192620 as a simple table

n a(n)
0 1
1 4
2 28
3 224
4 1948
5 17928
6 171776
7 1695872
8 17133436
9 176297668
10 1841222776
11 19467629120
12 207978652416
13 2241618514120
14 24345336854400
15 266168049520832
16 2927074607294300
17 32356419163487336
18 359330087240388828
19 4007079691584624576

[1,4,28,224,1948,17928,171776,1695872,17133436,
 176297668,1841222776,19467629120,207978652416,
 2241618514120,24345336854400,266168049520832,
 2927074607294300,32356419163487336,
 359330087240388828,4007079691584624576]

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