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A089717 as a simple table

n a(n)
1 0
2 1
3 3
4 6
5 10
6 15
7 21
8 28
9 36
10 45
11 66
12 253
13 561
14 990
15 1540
16 2211
17 3003
18 3916
19 4950
20 5151
21 6216
22 7381
23 8646
24 10011
25 11476
26 13041
27 14706
28 16471
29 18336
30 20503
31 22578
32 24753
33 27028
34 29403
35 31878
36 34453
37 37128
38 39903
39 42778
40 46056
41 49141
42 52326
43 55611

[0,1,3,6,10,15,21,28,36,45,66,253,561,990,1540,
 2211,3003,3916,4950,5151,6216,7381,8646,10011,
 11476,13041,14706,16471,18336,20503,22578,24753,
 27028,29403,31878,34453,37128,39903,42778,46056,
 49141,52326,55611]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)