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A187077 as a simple table

n a(n)
1 1
2 4
3 18
4 83
5 385
6 1788
7 8305
8 38575
9 179170
10 832189
11 3865253
12 17952864
13 83385309
14 387298083
15 1798875698
16 8355202169
17 38807241321
18 180247221864
19 837190686169
20 3888482927823
21 18060759310562
22 83886449530197
23 389625723579965

[1,4,18,83,385,1788,8305,38575,179170,832189,
 3865253,17952864,83385309,387298083,1798875698,
 8355202169,38807241321,180247221864,837190686169,
 3888482927823,18060759310562,83886449530197,
 389625723579965]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)