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A170809 as a simple table

n a(n)
1 1
2 2
3 4
4 12
5 40
6 116
7 200
8 444
9 864
10 3368
11 10936
12 38320
13 139848
14 534828
15 2230464
16 9802612
17 46188544
18 231210272
19 1213437504
20 6717614708
21 39002297800 

[1,2,4,12,40,116,200,444,864,3368,10936,38320,
 139848,534828,2230464,9802612,46188544,231210272,
 1213437504,6717614708,39002297800]

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Last modified August 23 20:36 EDT 2024. Contains 375396 sequences. (Running on oeis4.)