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A027630 as a simple table

n a(n)
0 1
1 15
2 135
3 870
4 3992
5 14142
6 41400
7 104870
8 237288
9 490654
10 942888
11 1705510
12 2932344
13 4829246
14 7664856
15 11782374
16 17612360
17 25686558
18 36652744
19 51290598
20 70528600
21 95461950
22 127371512
23 167743782
24 218291880
25 280977566
26 358034280
27 451991206
28 565698360

[1,15,135,870,3992,14142,41400,104870,237288,
 490654,942888,1705510,2932344,4829246,7664856,
 11782374,17612360,25686558,36652744,51290598,
 70528600,95461950,127371512,167743782,218291880,
 280977566,358034280,451991206,565698360]

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Last modified April 25 12:53 EDT 2024. Contains 371969 sequences. (Running on oeis4.)