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A290439 as a simple table

n a(n)
0 0
1 2
2 4
3 11
4 22
5 43
6 85
7 171
8 366
9 774
10 1586
11 3136
12 6123
13 12088
14 24283
15 49040
16 99031
17 200444
18 405931 

[0,2,4,11,22,43,85,171,366,774,1586,3136,6123,
 12088,24283,49040,99031,200444,405931]

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