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A207417 as a simple table

n a(n)
1 21
2 441
3 1889
4 8465
5 50139
6 220882
7 891720
8 3919354
9 16153614
10 62844340
11 248939744
12 971561382
13 3682206767
14 13939172767
15 52509796817
16 195002378289
17 720554922955
18 2654209247431
19 9705662821905
20 35326530765908
21 128233462946586

[21,441,1889,8465,50139,220882,891720,3919354,
 16153614,62844340,248939744,971561382,3682206767,
 13939172767,52509796817,195002378289,720554922955,
 2654209247431,9705662821905,35326530765908,
 128233462946586]

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Last modified April 24 09:18 EDT 2024. Contains 371935 sequences. (Running on oeis4.)