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A180374 as a simple table

n a(n)
1 1
2 21
3 156
4 1236
5 9552
6 74568
7 579792
8 4515312
9 35141952
10 273573984
11 2129509056
12 16576843584
13 129037857024
14 1004466036864
15 7819018652928
16 60865289156352
17 473791157511168
18 3688113552987648
19 28709232900123648
20 223480124314162176

[1,21,156,1236,9552,74568,579792,4515312,35141952,
 273573984,2129509056,16576843584,129037857024,
 1004466036864,7819018652928,60865289156352,
 473791157511168,3688113552987648,
 28709232900123648,223480124314162176]

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Last modified April 24 02:28 EDT 2024. Contains 371917 sequences. (Running on oeis4.)