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A271101 as a simple table

n a(n)
1 21
2 33
3 57
4 69
5 85
6 93
7 129
8 133
9 145
10 177
11 205
12 213
13 217
14 237
15 249
16 253
17 265
18 309
19 393
20 417
21 445
22 469
23 489
24 493
25 505
26 517
27 553
28 565
29 573
30 597
31 633
32 669
33 685
34 697
35 753
36 781
37 793
38 813
39 817
40 865
41 889
42 913
43 933
44 949
45 973
46 985
47 993
48 1057
49 1077
50 1137
51 1149
52 1177
53 1257
54 1273
55 1285
56 1329

[21,33,57,69,85,93,129,133,145,177,205,213,217,
 237,249,253,265,309,393,417,445,469,489,493,505,
 517,553,565,573,597,633,669,685,697,753,781,793,
 813,817,865,889,913,933,949,973,985,993,1057,1077,
 1137,1149,1177,1257,1273,1285,1329]

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Last modified October 14 08:54 EDT 2019. Contains 327995 sequences. (Running on oeis4.)