A174751 - OEIS

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A174751 as a simple table

n	a(n)
1	1
2	25
3	1249
4	62425
5	3120001
6	155937625
7	7793761249
8	389532124825
9	19468812480001
10	973051091875225
11	48633085781281249
12	2430681237972187225
13	121485428812828080001
14	6071840759403431812825
15	303470552541358762561249

[1,25,1249,62425,3120001,155937625,7793761249, 389532124825,19468812480001,973051091875225, 48633085781281249,2430681237972187225, 121485428812828080001,6071840759403431812825, 303470552541358762561249]