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A208167 as a simple table

n a(n)
1 21
2 441
3 2491
4 13825
5 63031
6 297702
7 1474641
8 7151473
9 34264481
10 166182659
11 805621207
12 3890807396
13 18817025188
14 91075073881
15 440491413435
16 2130434106639
17 10306317416695
18 49854704983253
19 241148925982311
20 1166495712482115

[21,441,2491,13825,63031,297702,1474641,7151473,
 34264481,166182659,805621207,3890807396,
 18817025188,91075073881,440491413435,
 2130434106639,10306317416695,49854704983253,
 241148925982311,1166495712482115]

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Last modified February 24 22:57 EST 2020. Contains 332216 sequences. (Running on oeis4.)