a(n) = H(n-1, n, n+1) where H(a, b, c) = (a + b + c)*(a + b - c)*(b + c - a)*(c + a - b) is Heron's polynomial.

A339488

a(n) = H(n-1, n, n+1) where H(a, b, c) = (a + b + c)*(a + b - c)*(b + c - a)*(c + a - b) is Heron's polynomial.

Terms

    a(0) =0a(1) =-9a(2) =0a(3) =135a(4) =576a(5) =1575a(6) =3456a(7) =6615a(8) =11520a(9) =18711a(10) =28800a(11) =42471a(12) =60480a(13) =83655a(14) =112896a(15) =149175a(16) =193536a(17) =247095a(18) =311040a(19) =386631a(20) =475200a(21) =578151a(22) =696960a(23) =833175a(24) =988416a(25) =1164375a(26) =1362816a(27) =1585575a(28) =1834560a(29) =2111751

External references