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A215193 as a simple table

n a(n)
1 0
2 30
3 440
4 2898
5 11756
6 36864
7 95832
8 219092
9 452368
10 864810
11 1551080
12 2642774
13 4310012
14 6776612
15 10320160
16 15292160
17 22115896
18 31311374
19 43491392
20 59391706
21 79863756
22 105911744
23 138681424
24 179503444
25 229878952
26 291529666
27 366378408

[0,30,440,2898,11756,36864,95832,219092,452368,
 864810,1551080,2642774,4310012,6776612,10320160,
 15292160,22115896,31311374,43491392,59391706,
 79863756,105911744,138681424,179503444,229878952,
 291529666,366378408]

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Last modified May 20 15:56 EDT 2022. Contains 353874 sequences. (Running on oeis4.)