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A115136 as a simple table

n a(n)
0 1
1 4
2 21
3 124
4 773
5 4988
6 33029
7 223228
8 1533957
9 10686460
10 75309061
11 535920636
12 3845881861
13 27800469500
14 202244161541
15 1479594737660
16 10878806654981
17 80345708888060
18 595788935725061
19 4434080431079420
20 33109442115403781

[1,4,21,124,773,4988,33029,223228,1533957,
 10686460,75309061,535920636,3845881861,
 27800469500,202244161541,1479594737660,
 10878806654981,80345708888060,595788935725061,
 4434080431079420,33109442115403781]

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Last modified April 25 11:39 EDT 2024. Contains 371969 sequences. (Running on oeis4.)