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A088957 as a simple table

n a(n)
0 1
1 2
2 6
3 29
4 212
5 2117
6 26830
7 412015
8 7433032
9 154076201
10 3608522954
11 94238893883
12 2715385121740
13 85574061070045
14 2928110179818478
15 108110945014584623
16 4284188833355367440
17 181370804507130015569
18 8169524599872649117330
19 390114757072969964280163

[1,2,6,29,212,2117,26830,412015,7433032,154076201,
 3608522954,94238893883,2715385121740,
 85574061070045,2928110179818478,
 108110945014584623,4284188833355367440,
 181370804507130015569,8169524599872649117330,
 390114757072969964280163]

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Last modified February 20 12:04 EST 2020. Contains 332076 sequences. (Running on oeis4.)