Triangle read by rows: Coefficients of the polynomials N(n, x) * EZ(n, x), where N denote the Narayana polynomials A131198 and EZ the Eulerian zig-zag polynomials A205497.
A373431
Triangle read by rows: Coefficients of the polynomials N(n, x) * EZ(n, x), where N denote the Narayana polynomials A131198 and EZ the Eulerian zig-zag polynomials A205497.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =4a(6) =4a(7) =1a(8) =1a(9) =9a(10) =25a(11) =25a(12) =9a(13) =1a(14) =1a(15) =17a(16) =97a(17) =221a(18) =221a(19) =97a(20) =17a(21) =1a(22) =1a(23) =29a(24) =291a(25) =1229a(26) =2476a(27) =2476a(28) =1229a(29) =291
External references
- oeis: A373431