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A219449 as a simple table

n a(n)
1 21
2 21
3 345
4 2603
5 21219
6 166748
7 1344235
8 10913024
9 88366783
10 712584163
11 5745262476
12 46374678582
13 374501872949
14 3023676494284
15 24407465600762
16 197018704356836
17 1590454512178565
18 12839424596411861
19 103648778945160117

[21,21,345,2603,21219,166748,1344235,10913024,
 88366783,712584163,5745262476,46374678582,
 374501872949,3023676494284,24407465600762,
 197018704356836,1590454512178565,
 12839424596411861,103648778945160117]

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Last modified September 27 07:07 EDT 2021. Contains 347673 sequences. (Running on oeis4.)