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A187276 as a simple table

n a(n)
1 1
2 2
3 6
4 19
5 61
6 196
7 630
8 2024
9 6499
10 20860
11 66941
12 214797
13 689201
14 2211347
15 7095226
16 22765414
17 73044113
18 234366327
19 751978494
20 2412768983
21 7741517800
22 24839137696
23 79697907919
24 255715662623

[1,2,6,19,61,196,630,2024,6499,20860,66941,214797,
 689201,2211347,7095226,22765414,73044113,
 234366327,751978494,2412768983,7741517800,
 24839137696,79697907919,255715662623]

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Last modified August 24 03:51 EDT 2019. Contains 326260 sequences. (Running on oeis4.)