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a(n) = Product_{i=1..n} A082993(n+1).
2

%I #11 Jan 22 2021 16:27:09

%S 1,3,21,903,1635333,5348629677111,57215678845771783382998197,

%T 6547267811564993508769323307224831436832226981434907

%N a(n) = Product_{i=1..n} A082993(n+1).

%C a(8) = 857334315927101186961957821844837532508142718268765884794690\

%C 22063498754404219681647201934916748805234491

%C is too large to fit in the DATA field.

%H Hugo Pfoertner, <a href="/A340505/b340505.txt">Table of n, a(n) for n = 0..11</a>

%e A082993(i), i >= 2, begins 3, 7, 43, 1811, ..., so a(3) = 3*7*43 = 903.

%Y Cf. A082993.

%K nonn

%O 0,2

%A _N. J. A. Sloane_, Jan 22 2021