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A037250 as a simple table

n a(n)
0 0
1 0
2 20
3 180
4 816
5 2600
6 6660
7 14700
8 29120
9 53136
10 90900
11 147620
12 229680
13 344760
14 501956
15 711900
16 986880
17 1340960
18 1790100
19 2352276
20 3047600
21 3898440
22 4929540
23 6168140
24 7644096
25 9390000
26 11441300

[0,0,20,180,816,2600,6660,14700,29120,53136,90900,
 147620,229680,344760,501956,711900,986880,1340960,
 1790100,2352276,3047600,3898440,4929540,6168140,
 7644096,9390000,11441300]

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Last modified November 14 19:59 EST 2019. Contains 329128 sequences. (Running on oeis4.)