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A189550 as a simple table

n a(n)
1 40
2 2000
3 31280
4 204544
5 911144
6 3022220
7 8655424
8 21284040
9 47231344
10 96369040
11 187026380
12 335425808
13 582302520
14 973424372
15 1563214444
16 2426917164
17 3699260196
18 5472064152
19 7976593144
20 11351136420
21 15868645560
22 21892595476

[40,2000,31280,204544,911144,3022220,8655424,
 21284040,47231344,96369040,187026380,335425808,
 582302520,973424372,1563214444,2426917164,
 3699260196,5472064152,7976593144,11351136420,
 15868645560,21892595476]

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Last modified March 25 22:28 EDT 2019. Contains 321477 sequences. (Running on oeis4.)