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A247407 as a simple table

n a(n)
1 0
2 40
3 340
4 3200
5 17164
6 65500
7 201172
8 553328
9 1328468
10 2988588
11 6174668
12 12011408
13 22100648
14 39018756
15 66002280
16 108120340
17 171569292
18 265248372
19 399981360
20 590794408
21 854909260
22 1216187576
23 1701586288
24 2346377932

[0,40,340,3200,17164,65500,201172,553328,1328468,
 2988588,6174668,12011408,22100648,39018756,
 66002280,108120340,171569292,265248372,399981360,
 590794408,854909260,1216187576,1701586288,
 2346377932]

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Last modified February 22 13:38 EST 2024. Contains 370256 sequences. (Running on oeis4.)