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A220117 as a simple table

n a(n)
0 0
1 3
2 13
3 47
4 55
5 254
6 767
7 987
8 6909
9 16127
10 28657
11 28670
12 125951
13 196575
14 393213
15 4160255
16 4177911
17 25157623
18 25157631
19 46137325
20 67088375
21 268296191
22 268434303
23 268435455

[0,3,13,47,55,254,767,987,6909,16127,28657,28670,
 125951,196575,393213,4160255,4177911,25157623,
 25157631,46137325,67088375,268296191,268434303,
 268435455]

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Last modified August 16 13:06 EDT 2024. Contains 375174 sequences. (Running on oeis4.)