Inverse of number triangle A(n,k) = 1/C(n) if k <= n <= 2k, 0 otherwise, where C(n) = A000108(n).

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =-1a(5) =2a(6) =0a(7) =1a(8) =-2a(9) =5a(10) =0a(11) =0a(12) =0a(13) =-5a(14) =14a(15) =0a(16) =-1a(17) =2a(18) =0a(19) =-14a(20) =42a(21) =0a(22) =0a(23) =0a(24) =0a(25) =0a(26) =-42a(27) =132a(28) =0a(29) =1