A172786 - OEIS

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A172786 as a simple table

n	a(n)
1	51
2	2108358849529
3	576429489441112352734523835
4	81775344380801671912399265731289816687307700
5	1422407573139278002798418134584320442947352453284455417854786600

[51,2108358849529,576429489441112352734523835, 81775344380801671912399265731289816687307700, 14224075731392780027984181345843204429473524532844\ 55417854786600]