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A016321 as a simple table

n a(n)
0 1
1 21
2 313
3 4065
4 49081
5 566721
6 6350473
7 69654225
8 751887961
9 8016991521
10 84652923433
11 886876310385
12 9231886792441
13 95586981129921
14 985282830165193
15 10117545471478545
16 103557909243290521
17 1057021183189581921

[1,21,313,4065,49081,566721,6350473,69654225,
 751887961,8016991521,84652923433,886876310385,
 9231886792441,95586981129921,985282830165193,
 10117545471478545,103557909243290521,
 1057021183189581921]

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Last modified May 23 11:05 EDT 2019. Contains 323513 sequences. (Running on oeis4.)