Triangle T(n,k) read by rows: T(n,n) = -1, T(n,0) = 5^(n - 1), T(n,k) = -5^(n - k - 1), 1 <= k <= n - 1.
A152572
Triangle T(n,k) read by rows: T(n,n) = -1, T(n,0) = 5^(n - 1), T(n,k) = -5^(n - k - 1), 1 <= k <= n - 1.
Terms
- a(0) =-1a(1) =1a(2) =-1a(3) =5a(4) =-1a(5) =-1a(6) =25a(7) =-5a(8) =-1a(9) =-1a(10) =125a(11) =-25a(12) =-5a(13) =-1a(14) =-1a(15) =625a(16) =-125a(17) =-25a(18) =-5a(19) =-1a(20) =-1a(21) =3125a(22) =-625a(23) =-125a(24) =-25a(25) =-5a(26) =-1a(27) =-1a(28) =15625a(29) =-3125
External references
- oeis: A152572