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A150658 as a simple table

n a(n)
0 1
1 2
2 7
3 28
4 120
5 536
6 2457
7 11481
8 54360
9 259969
10 1252706
11 6072223
12 29572252
13 144564197
14 708884636
15 3484931078
16 17168524909
17 84731554148
18 418805940619
19 2072716595002
20 10269460176509
21 50929639896861
22 252786813629413
23 1255605670244016
24 6240630233618970
25 31034662772521170
26 154411925525049741

[1,2,7,28,120,536,2457,11481,54360,259969,1252706,
 6072223,29572252,144564197,708884636,3484931078,
 17168524909,84731554148,418805940619,
 2072716595002,10269460176509,50929639896861,
 252786813629413,1255605670244016,6240630233618970,
 31034662772521170,154411925525049741]

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Last modified March 31 15:40 EDT 2020. Contains 333151 sequences. (Running on oeis4.)