Triangle, read by rows, T(n, k) = 2*A123125(n-1, k), for n >= 2, otherwise T(n, 0) = T(n, n) = -1, with T(0, 0) = T(1, 0) = 1.

A141591

Triangle, read by rows, T(n, k) = 2*A123125(n-1, k), for n >= 2, otherwise T(n, 0) = T(n, n) = -1, with T(0, 0) = T(1, 0) = 1.

Terms

    a(0) =1a(1) =1a(2) =-1a(3) =-1a(4) =2a(5) =-1a(6) =-1a(7) =2a(8) =2a(9) =-1a(10) =-1a(11) =2a(12) =8a(13) =2a(14) =-1a(15) =-1a(16) =2a(17) =22a(18) =22a(19) =2a(20) =-1a(21) =-1a(22) =2a(23) =52a(24) =132a(25) =52a(26) =2a(27) =-1a(28) =-1a(29) =2

External references