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A108404 as a simple table

n a(n)
0 1
1 4
2 21
3 124
4 761
5 4724
6 29421
7 183404
8 1143601
9 7131364
10 44471301
11 277325404
12 1729418921
13 10784771924
14 67254567261
15 419404046924
16 2615432135521
17 16310012568004
18 101710347053301
19 634272638178364
20 3955367287840601

[1,4,21,124,761,4724,29421,183404,1143601,7131364,
 44471301,277325404,1729418921,10784771924,
 67254567261,419404046924,2615432135521,
 16310012568004,101710347053301,634272638178364,
 3955367287840601]

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Last modified April 24 13:56 EDT 2024. Contains 371958 sequences. (Running on oeis4.)