Central coefficients of the Riordan matrix (g(x),x*g(x)), where g(x) = (1-x-sqrt(1-2x-3x^2-4x^3))/(2*x^2*(1+x)) (A190252).
A190253
Central coefficients of the Riordan matrix (g(x),x*g(x)), where g(x) = (1-x-sqrt(1-2x-3x^2-4x^3))/(2*x^2*(1+x)) (A190252).
Terms
- a(0) =1a(1) =2a(2) =9a(3) =48a(4) =265a(5) =1512a(6) =8813a(7) =52112a(8) =311427a(9) =1876290a(10) =11376893a(11) =69341868a(12) =424445996a(13) =2607388252a(14) =16066200465a(15) =99256947520a(16) =614611513599
External references
- oeis: A190253