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A133567 A007318 * A133566. 4

%I #9 Mar 23 2022 07:45:00

%S 1,1,1,1,3,1,1,6,3,1,1,10,6,5,1,1,15,10,15,5,1,1,21,15,35,15,7,1,1,28,

%T 21,70,35,28,7,1,1,36,28,126,70,84,28,9,1,1,45,36,210,126,210,84,45,9,

%U 1

%N A007318 * A133566.

%C Row sums = A083329: (1, 2, 5, 11, 23, 47, 95, ...).

%C From _Clark Kimberling_, Feb 28 2012: (Start)

%C A133567 is jointly generated with A133084 as an array of coefficients of polynomials v(n,x): initially, u(1,x) = v(1,x) = 1; for n > 1, u(n,x) = u(n-1,x) + (x+1)*v(n-1)x and v(n,x) = x*u(n-1,x) + v(n-1,x) + 1. See the Mathematica section. (End)

%F Binomial transform of triangle A133566.

%e First few rows of the triangle:

%e 1;

%e 1, 1;

%e 1, 3, 1;

%e 1, 6, 3, 1;

%e 1, 10, 6, 5, 1;

%e 1, 15, 10, 15, 5, 1;

%e 1, 21, 15, 35, 15, 7, 1;

%e ...

%t u[1, x_] := 1; v[1, x_] := 1; z = 16;

%t u[n_, x_] := u[n - 1, x] + x*v[n - 1, x];

%t v[n_, x_] := x*u[n - 1, x] + v[n - 1, x] + 1;

%t Table[Expand[u[n, x]], {n, 1, z/2}]

%t Table[Expand[v[n, x]], {n, 1, z/2}]

%t cu = Table[CoefficientList[u[n, x], x], {n, 1, z}];

%t TableForm[cu]

%t Flatten[%] (* A133567 *)

%t Table[Expand[v[n, x]], {n, 1, z}]

%t cv = Table[CoefficientList[v[n, x], x], {n, 1, z}];

%t TableForm[cv]

%t Flatten[%] (* A133084 *)

%t (* _Clark Kimberling_, Feb 28 2012 *)

%Y Cf. A133566, A083329, A133084.

%K nonn,tabl

%O 1,5

%A _Gary W. Adamson_, Sep 16 2007

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Last modified September 6 04:22 EDT 2024. Contains 375702 sequences. (Running on oeis4.)