A218521 - OEIS

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A218521 as a simple table

n	a(n)
1	602
2	242438
3	100029148
4	38497164700
5	15254005086276
6	5977895789290552
7	2345237392530015812
8	920135128267216305816
9	361061212834288178529464
10	141687156380002483076174644
11	55601697647561060078651796422

[602,242438,100029148,38497164700,15254005086276, 5977895789290552,2345237392530015812, 920135128267216305816,361061212834288178529464, 141687156380002483076174644, 55601697647561060078651796422]