A224121 - OEIS

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A224121 as a simple table

n	a(n)
1	50
2	1747
3	47059
4	1070499
5	21632718
6	400993828
7	6962188526
8	114852977638
9	1818933416948
10	27867476494858
11	415428832366407
12	6052984236034862
13	86509041863415952
14	1216196228905636823
15	16857689384122403297

[50,1747,47059,1070499,21632718,400993828, 6962188526,114852977638,1818933416948, 27867476494858,415428832366407,6052984236034862, 86509041863415952,1216196228905636823, 16857689384122403297]