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A208898 as a simple table

n a(n)
0 1
1 1
2 2
3 9
4 72
5 880
6 14946
7 331177
8 9157984
9 305879724
10 12036430600
11 547226046939
12 28298540270928
13 1643380366183920
14 106042236588594096
15 7535372761616117625
16 585204851983514095424
17 49344635724104556446660
18 4491848127809479571999928
19 439231681095730953672503448

[1,1,2,9,72,880,14946,331177,9157984,305879724,
 12036430600,547226046939,28298540270928,
 1643380366183920,106042236588594096,
 7535372761616117625,585204851983514095424,
 49344635724104556446660,4491848127809479571999928,
 439231681095730953672503448]

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Last modified September 16 21:28 EDT 2021. Contains 347473 sequences. (Running on oeis4.)