login
a(n) = Det(M) where M is an n X n matrix with M[i,j] = (i+j)^(i+j).
0

%I #5 Jan 25 2023 18:14:58

%S 1,4,295,1123804,426617588624,26305269856043508288,

%T 389245361792549353494110384128,

%U 1914052488896530295354369845193677065142272,4135916249063442625494509182129275645718357035424545767424

%N a(n) = Det(M) where M is an n X n matrix with M[i,j] = (i+j)^(i+j).

%t A[i_, j_] := (i + j)^(i + j); a[n_] := Det[Table[A[i, j], {i, n}, {j, n}]]; Table[a[n], {n, 10}]

%K nonn

%O 0,2

%A _José María Grau Ribas_, Apr 17 2010

%E a(0)=1 prepended by _Alois P. Heinz_, Jan 25 2023