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A216172 as a simple table

n a(n)
1 0
2 0
3 1
4 4
5 10
6 21
7 39
8 66
9 105
10 159
11 231
12 325
13 445
14 595
15 780
16 1005
17 1275
18 1596
19 1974
20 2415
21 2926
22 3514
23 4186
24 4950
25 5814
26 6786
27 7875
28 9090
29 10440
30 11935
31 13585
32 15400
33 17391
34 19569
35 21945
36 24531
37 27339
38 30381
39 33670
40 37219
41 41041
42 45150
43 49560
44 54285
45 59340

[0,0,1,4,10,21,39,66,105,159,231,325,445,595,780,
 1005,1275,1596,1974,2415,2926,3514,4186,4950,5814,
 6786,7875,9090,10440,11935,13585,15400,17391,
 19569,21945,24531,27339,30381,33670,37219,41041,
 45150,49560,54285,59340]

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Last modified April 23 23:26 EDT 2024. Contains 371917 sequences. (Running on oeis4.)