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A180250 as a simple table

n a(n)
1 0
2 1
3 5
4 35
5 225
6 1475
7 9625
8 62875
9 410625
10 2681875
11 17515625
12 114396875
13 747140625
14 4879671875
15 31869765625
16 208145546875
17 1359425390625
18 8878582421875
19 57987166015625
20 378721654296875
21 2473479931640625
22 16154616201171875
23 105507880322265625

[0,1,5,35,225,1475,9625,62875,410625,2681875,
 17515625,114396875,747140625,4879671875,
 31869765625,208145546875,1359425390625,
 8878582421875,57987166015625,378721654296875,
 2473479931640625,16154616201171875,
 105507880322265625]

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Last modified April 20 00:03 EDT 2024. Contains 371798 sequences. (Running on oeis4.)