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A099921 as a simple table

n a(n)
1 5
2 5
3 20
4 45
5 125
6 320
7 845
8 2205
9 5780
10 15125
11 39605
12 103680
13 271445
14 710645
15 1860500
16 4870845
17 12752045
18 33385280
19 87403805
20 228826125
21 599074580
22 1568397605
23 4106118245
24 10749957120
25 28143753125
26 73681302245
27 192900153620
28 505019158605
29 1322157322205

[5,5,20,45,125,320,845,2205,5780,15125,39605,
 103680,271445,710645,1860500,4870845,12752045,
 33385280,87403805,228826125,599074580,1568397605,
 4106118245,10749957120,28143753125,73681302245,
 192900153620,505019158605,1322157322205]

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Last modified April 20 05:25 EDT 2024. Contains 371798 sequences. (Running on oeis4.)