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A031081 as a simple table

n a(n)
1 4
2 18
3 36
4 54
5 63
6 65
7 67
8 69
9 71
10 72
11 73
12 75
13 77
14 79
15 90
16 108
17 126
18 144
19 167
20 194
21 221
22 248
23 262
24 265
25 268
26 271
27 274
28 275
29 277
30 280
31 283
32 286
33 302
34 329
35 356
36 383
37 410
38 437
39 464
40 491
41 505
42 508
43 511
44 514
45 517
46 518
47 520
48 523
49 526

[4,18,36,54,63,65,67,69,71,72,73,75,77,79,90,108,
 126,144,167,194,221,248,262,265,268,271,274,275,
 277,280,283,286,302,329,356,383,410,437,464,491,
 505,508,511,514,517,518,520,523,526]

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Last modified December 7 15:24 EST 2021. Contains 349581 sequences. (Running on oeis4.)