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A218420 as a simple table

n a(n)
1 3
2 13
3 49
4 191
5 737
6 2849
7 11011
8 42557
9 164481
10 635711
11 2456993
12 9496161
13 36702211
14 141852301
15 548252401
16 2118969471
17 8189716289
18 31652864193
19 122336815619
20 472825977597
21 1827449929601
22 7063007117695
23 27298186799297
24 105506194473793

[3,13,49,191,737,2849,11011,42557,164481,635711,
 2456993,9496161,36702211,141852301,548252401,
 2118969471,8189716289,31652864193,122336815619,
 472825977597,1827449929601,7063007117695,
 27298186799297,105506194473793]

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Last modified August 27 17:42 EDT 2024. Contains 375471 sequences. (Running on oeis4.)