Triangle read by rows: T(n,k) is the coefficient of t^k (k>=1) in the polynomial P[n,t] defined by P[1,t]=t, P[2,t]=t^2, P[n,t]=tP[n-1,t]+t^2*P^2[n-2,1].
A103524
Triangle read by rows: T(n,k) is the coefficient of t^k (k>=1) in the polynomial P[n,t] defined by P[1,t]=t, P[2,t]=t^2, P[n,t]=tP[n-1,t]+t^2*P^2[n-2,1].
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =0a(7) =1a(8) =1a(9) =1a(10) =0a(11) =4a(12) =1a(13) =1a(14) =1a(15) =0a(16) =9a(17) =4a(18) =1a(19) =1a(20) =1a(21) =0a(22) =49a(23) =9a(24) =4a(25) =1a(26) =1a(27) =1a(28) =0a(29) =256
External references
- oeis: A103524