Number of lattice points inside or on the 4-dimensional hypersphere x^2 + y^2 + z^2 + u^2 = 10^n.

A373882

Number of lattice points inside or on the 4-dimensional hypersphere x^2 + y^2 + z^2 + u^2 = 10^n.

Terms

    a(0) =9a(1) =569a(2) =49689a(3) =4937225a(4) =493490641a(5) =49348095737

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