Irregular symmetric triangle of coefficients T(n,k) of the polynomials p(n,x) = Sum_{k=0..n} binomial(n+1,k)*(1+x)^(2*k)*(-x)^(n-k) for 0 <= k <= 2*n.
A264766
Irregular symmetric triangle of coefficients T(n,k) of the polynomials p(n,x) = Sum_{k=0..n} binomial(n+1,k)*(1+x)^(2*k)*(-x)^(n-k) for 0 <= k <= 2*n.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =2a(4) =3a(5) =9a(6) =13a(7) =9a(8) =3a(9) =4a(10) =18a(11) =40a(12) =51a(13) =40a(14) =18a(15) =4a(16) =5a(17) =30a(18) =90a(19) =165a(20) =201a(21) =165a(22) =90a(23) =30a(24) =5a(25) =6a(26) =45a(27) =170a(28) =405a(29) =666
External references
- oeis: A264766