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a(n) = [x^(n^n)] Product_{k>=1} 1 / (1 - x^(k^n)).
2

%I #7 Jan 17 2020 04:49:49

%S 1,2,5,36,1104,140549,82159688,237700614212,3591644060379486

%N a(n) = [x^(n^n)] Product_{k>=1} 1 / (1 - x^(k^n)).

%C Number of partitions of n^n into n-th powers.

%F a(n) = A259799(n,n).

%e a(2) = 2 because we have [4] and [1, 1, 1, 1].

%Y Diagonal of A259799.

%Y Cf. A145514.

%K nonn,more

%O 1,2

%A _Ilya Gutkovskiy_, Jan 16 2020

%E a(8)-a(9) from _Giovanni Resta_, Jan 17 2020