Triangle read by rows: T(n,k) = T(n-k,k-1) - 2*T(n-k,k) + T(n-k,k+1) with T(0,0) = 1 for 0 <= k <= A003056(n).
A291940
Triangle read by rows: T(n,k) = T(n-k,k-1) - 2*T(n-k,k) + T(n-k,k+1) with T(0,0) = 1 for 0 <= k <= A003056(n).
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =-2a(5) =0a(6) =4a(7) =1a(8) =0a(9) =-7a(10) =-2a(11) =0a(12) =12a(13) =2a(14) =0a(15) =-22a(16) =-3a(17) =1a(18) =0a(19) =41a(20) =8a(21) =-2a(22) =0a(23) =-74a(24) =-15a(25) =2a(26) =0a(27) =133a(28) =23a(29) =-5
External references
- oeis: A291940