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A187304 as a simple table

n a(n)
1 0
2 0
3 54
4 2968
5 25716
6 87432
7 209700
8 399524
9 668522
10 1010572
11 1430378
12 1921532
13 2485628
14 3120300
15 3825896
16 4601996
17 5448634
18 6365780
19 7353434
20 8411596
21 9540266
22 10739444
23 12009130
24 13349324
25 14760026
26 16241236
27 17792954
28 19415180
29 21107914

[0,0,54,2968,25716,87432,209700,399524,668522,
 1010572,1430378,1921532,2485628,3120300,3825896,
 4601996,5448634,6365780,7353434,8411596,9540266,
 10739444,12009130,13349324,14760026,16241236,
 17792954,19415180,21107914]

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Last modified April 24 20:06 EDT 2024. Contains 371963 sequences. (Running on oeis4.)