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A020640 as a simple table

n a(n)
1 1
2 2
3 4
4 5
5 6
6 8
7 10
8 12
9 16
10 18
11 20
12 22
13 26
14 34
15 37
16 40
17 42
18 44
19 48
20 52
21 54
22 60
23 62
24 64
25 70
26 76
27 79
28 88
29 94
30 96
31 102
32 104
33 108
34 114
35 118
36 122
37 130
38 136
39 152
40 156
41 158
42 170
43 172
44 174
45 194
46 196
47 202
48 207
49 210
50 217
51 228
52 234
53 238
54 239
55 248
56 262
57 268
58 280
59 281

[1,2,4,5,6,8,10,12,16,18,20,22,26,34,37,40,42,44,
 48,52,54,60,62,64,70,76,79,88,94,96,102,104,108,
 114,118,122,130,136,152,156,158,170,172,174,194,
 196,202,207,210,217,228,234,238,239,248,262,268,
 280,281]

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Last modified February 21 23:44 EST 2019. Contains 320381 sequences. (Running on oeis4.)