A233244 - OEIS

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A233244 as a simple table

n	a(n)
1	1248
2	2565169
3	8259321811
4	26484848685044
5	85091928322674062
6	273407904115337411320
7	878515500504975619593232
8	2822866314474146429532816501
9	9070511857884868729790040866912

[1248,2565169,8259321811,26484848685044, 85091928322674062,273407904115337411320, 878515500504975619593232, 2822866314474146429532816501, 9070511857884868729790040866912]