A280283 - OEIS

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A280283 as a simple table

n	a(n)
1	28
2	20444
3	3753846
4	566131860
5	77217209188
6	9962925424456
7	1239330073038612
8	150266249084966072
9	17876201804035798190
10	2095643146354862834384
11	242825031550728210501298

[28,20444,3753846,566131860,77217209188, 9962925424456,1239330073038612,150266249084966072, 17876201804035798190,2095643146354862834384, 242825031550728210501298]