A176382 - OEIS

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A176382 as a simple table

n	a(n)
1	1
2	2281249
3	10408194000001
4	47487364308614281249
5	216661004683313632776000001
6	988515400545561595548925838281249
7	4510099537958107027564099725673746000001

[1,2281249,10408194000001,47487364308614281249, 216661004683313632776000001, 988515400545561595548925838281249, 4510099537958107027564099725673746000001]