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A246020 as a simple table

n a(n)
0 1
1 3
2 15
3 81
4 435
5 2349
6 12681
7 68499
8 370023
9 1998945
10 10798821
11 58338495
12 315162657
13 1702608147
14 9198028791
15 49690672857
16 268444806483
17 1450224181197
18 7834572084033
19 42324849273915
20 228652292458773
21 1235252381526711
22 6673226101644267
23 36050889090859101

[1,3,15,81,435,2349,12681,68499,370023,1998945,
 10798821,58338495,315162657,1702608147,9198028791,
 49690672857,268444806483,1450224181197,
 7834572084033,42324849273915,228652292458773,
 1235252381526711,6673226101644267,
 36050889090859101]

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Last modified August 8 07:01 EDT 2024. Contains 375020 sequences. (Running on oeis4.)