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A150188 as a simple table

n a(n)
0 1
1 2
2 6
3 21
4 77
5 294
6 1176
7 4763
8 19717
9 82867
10 351623
11 1508591
12 6523496
13 28396178
14 124410591
15 547816367
16 2423461096
17 10766562754
18 48003764190
19 214752543843
20 963633578716
21 4335715376201
22 19557245074613
23 88419476924596
24 400594258928572
25 1818505891287829
26 8270074885487383
27 37673616875532497

[1,2,6,21,77,294,1176,4763,19717,82867,351623,
 1508591,6523496,28396178,124410591,547816367,
 2423461096,10766562754,48003764190,214752543843,
 963633578716,4335715376201,19557245074613,
 88419476924596,400594258928572,1818505891287829,
 8270074885487383,37673616875532497]

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Last modified February 21 03:02 EST 2020. Contains 332086 sequences. (Running on oeis4.)