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A198680 as a simple table

n a(n)
1 0
2 15
3 21
4 33
5 39
6 45
7 57
8 63
9 78
10 87
11 93
12 99
13 111
14 117
15 132
16 135
17 150
18 156
19 165
20 171
21 186
22 189
23 204
24 210
25 222
26 228
27 234
28 249
29 255
30 261
31 273
32 279
33 294
34 297
35 312
36 318
37 327
38 333
39 348
40 351
41 366
42 372
43 384
44 390
45 396
46 405
47 420
48 426
49 438
50 444
51 450
52 462
53 468
54 483
55 489
56 495

[0,15,21,33,39,45,57,63,78,87,93,99,111,117,132,
 135,150,156,165,171,186,189,204,210,222,228,234,
 249,255,261,273,279,294,297,312,318,327,333,348,
 351,366,372,384,390,396,405,420,426,438,444,450,
 462,468,483,489,495]

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Last modified May 14 04:15 EDT 2024. Contains 372528 sequences. (Running on oeis4.)