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A184877 as a simple table

na(n)
01
11
24
39
464
5225
62304
711025
8147456
9893025
1014745600
11108056025
122123366400
1318261468225
14416179814400
154108830350625
16106542032486400
171187451971330625
1834519618525593600
19428670161650355625
2013807847410237440000
21189043541287806830625
226682998146554920960000
23100004033341249813400625

[1,1,4,9,64,225,2304,11025,147456,893025,14745600,
 108056025,2123366400,18261468225,416179814400,
 4108830350625,106542032486400,1187451971330625,
 34519618525593600,428670161650355625,
 13807847410237440000,189043541287806830625,
 6682998146554920960000,100004033341249813400625]