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A077270 as a simple table

n a(n)
0 1
1 4
2 11
3 26
4 52
5 109
6 237
7 556
8 1405
9 3690
10 10085
11 28157
12 80071
13 230568
14 670122

[1,4,11,26,52,109,237,556,1405,3690,10085,28157,
 80071,230568,670122]

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Last modified July 5 15:26 EDT 2020. Contains 335473 sequences. (Running on oeis4.)