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A152725 as a simple table

n a(n)
0 0
1 1
2 63
3 666
4 3430
5 12195
6 34461
7 83188
8 178956
9 352485
10 647515
11 1124046
12 1861938
13 2964871
14 4564665
15 6825960
16 9951256
17 14186313
18 19825911
19 27219970
20 36780030
21 48986091
22 64393813
23 83642076
24 107460900
25 136679725
26 172236051
27 215184438

[0,1,63,666,3430,12195,34461,83188,178956,352485,
 647515,1124046,1861938,2964871,4564665,6825960,
 9951256,14186313,19825911,27219970,36780030,
 48986091,64393813,83642076,107460900,136679725,
 172236051,215184438]

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Last modified August 24 18:52 EDT 2019. Contains 326295 sequences. (Running on oeis4.)