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A215863 as a simple table

n a(n)
0 0
1 19
2 135
3 540
4 1610
5 3990
6 8694
7 17220
8 31680
9 54945
10 90805
11 144144
12 221130
13 329420
14 478380
15 679320
16 945744
17 1293615
18 1741635
19 2311540
20 3028410
21 3920994
22 5022050
23 6368700
24 8002800
25 9971325
26 12326769
27 15127560
28 18438490
29 22331160
30 26884440
31 32184944
32 38327520

[0,19,135,540,1610,3990,8694,17220,31680,54945,
 90805,144144,221130,329420,478380,679320,945744,
 1293615,1741635,2311540,3028410,3920994,5022050,
 6368700,8002800,9971325,12326769,15127560,
 18438490,22331160,26884440,32184944,38327520]

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Last modified August 12 06:37 EDT 2024. Contains 375085 sequences. (Running on oeis4.)