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A069215 as a simple table

n a(n)
1 1
2 21
3 63
4 270
5 291
6 2991
7 6102
8 46676013
9 69460293
10 2346534651
11 6313047393
12 23400000651
13 80050617822
14 234065340651
15 234659934651
16 2340000000651
17 2530227348360
18 2934000006591

[1,21,63,270,291,2991,6102,46676013,69460293,
 2346534651,6313047393,23400000651,80050617822,
 234065340651,234659934651,2340000000651,
 2530227348360,2934000006591]

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Last modified September 25 00:48 EDT 2020. Contains 337333 sequences. (Running on oeis4.)