A109559 - OEIS

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A109559 as a simple table

n	a(n)
0	23
1	31
2	283
3	337
4	409
5	421
6	547
7	577
8	631
9	661
10	797
11	997
12	1201
13	1237
14	1307
15	1459
16	1499
17	1511
18	1531
19	1583
20	1709
21	1789
22	1811
23	1889
24	2039
25	2357
26	2423
27	2633

[23,31,283,337,409,421,547,577,631,661,797,997, 1201,1237,1307,1459,1499,1511,1531,1583,1709,1789, 1811,1889,2039,2357,2423,2633]