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A197230 as a simple table

n a(n)
1 2
2 12
3 55
4 242
5 1178
6 5355
7 24723
8 116440
9 545287
10 2548432
11 11939565
12 55931989
13 261856867
14 1226207807
15 5742642388
16 26891481148
17 125926466092
18 589702469437
19 2761498731050
20 12931647025852
21 60557080572253
22 283580433219551

[2,12,55,242,1178,5355,24723,116440,545287,
 2548432,11939565,55931989,261856867,1226207807,
 5742642388,26891481148,125926466092,589702469437,
 2761498731050,12931647025852,60557080572253,
 283580433219551]

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)