Permanent of the symmetric n x n matrix of binomial coefficients in S000061.
1, 3, 35, 1625, 301501, 223727931, 664027495067, 7882889445845553, 374307461786150039341, 71094317517818229430634443, 54016473080283197162871309369823, 164180413591614722725059485805374744105, 1996341102310530780023501278692058093020378765
1
T. D. Noe, Plot of 16 terms
T. D. Noe, Table of 16 terms
(Mma) Permanent[m_List] := With[{v = Array[x, Length[m]]}, Coefficient[Times @@ (m.v), Times @@ v]]; Table[m = Table[Binomial[i + j, i], {i, 0, n}, {j, 0, n}]; Permanent[m], {n, 0, 15}]
nonn,hard
T. D. Noe, May 28 2014