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A147951 as a simple table

n a(n)
1 1
2 2
3 6
4 16
5 74
6 304
7 1424
8 7946
9 39908
10 223514
11 1294348
12 8736910
13 58707788
14 401926462
15 3287231046
16 25868828516

[1,2,6,16,74,304,1424,7946,39908,223514,1294348,
 8736910,58707788,401926462,3287231046,25868828516]

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)