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A002981号作为一个简单的表

n个a(n)
10
21
2
4
511
627
737
841
973
1077
11116
12154
13320
14340
15399
16427
17872
181477
196380
2026951
21110059
22150209
23288465
24308084
25422429

[0,1,2,3,11,27,37,41,73,77,116,154,320,340,399,427,872,1477,6380,26951,110059,150209,288465,308084,422429]