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A270258 as a simple table

n a(n)
1 0
2 66
3 768
4 4428
5 14976
6 42750
7 96768
8 203448
9 376320
10 668250
11 1094400
12 1746756
13 2636928
14 3910998
15 5569536
16 7830000
17 10672128
18 14404338
19 18973440
20 24800700
21 31785600
22 40486446
23 50738688
24 63264168
25 77815296
26 95306250
27 115385088

[0,66,768,4428,14976,42750,96768,203448,376320,
 668250,1094400,1746756,2636928,3910998,5569536,
 7830000,10672128,14404338,18973440,24800700,
 31785600,40486446,50738688,63264168,77815296,
 95306250,115385088]

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Last modified September 4 15:25 EDT 2024. Contains 375683 sequences. (Running on oeis4.)