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A055848 as a simple table

n a(n)
0 1
1 15
2 105
3 495
4 1815
5 5577
6 15015
7 36465
8 81510
9 170170
10 335478
11 629850
12 1133730
13 1967070
14 3304290
15 5393454
16 8580495
17 13339425
18 20309575
19 30341025
20 44549505
21 64382175
22 91695825
23 128849175
24 178811100
25 245286756
26 332863740
27 447180580

[1,15,105,495,1815,5577,15015,36465,81510,170170,
 335478,629850,1133730,1967070,3304290,5393454,
 8580495,13339425,20309575,30341025,44549505,
 64382175,91695825,128849175,178811100,245286756,
 332863740,447180580]

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Last modified April 24 18:17 EDT 2024. Contains 371962 sequences. (Running on oeis4.)