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A083425 as a simple table

n a(n)
0 1
1 4
2 21
3 104
4 521
5 2604
6 13021
7 65104
8 325521
9 1627604
10 8138021
11 40690104
12 203450521
13 1017252604
14 5086263021
15 25431315104
16 127156575521
17 635782877604
18 3178914388021
19 15894571940104
20 79472859700521
21 397364298502604
22 1986821492513021
23 9934107462565104

[1,4,21,104,521,2604,13021,65104,325521,1627604,
 8138021,40690104,203450521,1017252604,5086263021,
 25431315104,127156575521,635782877604,
 3178914388021,15894571940104,79472859700521,
 397364298502604,1986821492513021,9934107462565104]

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Last modified April 24 08:56 EDT 2024. Contains 371934 sequences. (Running on oeis4.)