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A028993 as a simple table

n a(n)
0 1
1 27
2 85
3 175
4 297
5 451
6 637
7 855
8 1105
9 1387
10 1701
11 2047
12 2425
13 2835
14 3277
15 3751
16 4257
17 4795
18 5365
19 5967
20 6601
21 7267
22 7965
23 8695
24 9457
25 10251
26 11077
27 11935
28 12825
29 13747
30 14701
31 15687
32 16705
33 17755
34 18837
35 19951
36 21097
37 22275
38 23485
39 24727
40 26001
41 27307
42 28645

[1,27,85,175,297,451,637,855,1105,1387,1701,2047,
 2425,2835,3277,3751,4257,4795,5365,5967,6601,7267,
 7965,8695,9457,10251,11077,11935,12825,13747,
 14701,15687,16705,17755,18837,19951,21097,22275,
 23485,24727,26001,27307,28645]

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Last modified May 5 14:41 EDT 2024. Contains 372275 sequences. (Running on oeis4.)