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A215860 as a simple table

n a(n)
10 1
11 55
12 2365
13 90805
14 3367364
15 124984860
16 4743643190
17 186488038880
18 7653850266777
19 329429479792985
20 14903545528332565
21 709243144460040645
22 35495878932860944422
23 1866637759375098988740
24 103014318586612720480259
25 5957391569989223921495400 

[1,55,2365,90805,3367364,124984860,4743643190,
 186488038880,7653850266777,329429479792985,
 14903545528332565,709243144460040645,
 35495878932860944422,1866637759375098988740,
 103014318586612720480259,
 5957391569989223921495400]

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Last modified April 17 20:45 EDT 2024. Contains 371767 sequences. (Running on oeis4.)