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A193659 Q-residue of the triangle A094727, where Q=Pascal's triangle. (See Comments.) 2

%I #7 Feb 19 2015 14:20:53

%S 1,2,8,43,265,1832,14160,121771,1157557,12080436,137505288,1696841395,

%T 22578385961,322377704664,4917809053032,79840791037379,

%U 1374705370985669,25024307510421060,480230285880218992

%N Q-residue of the triangle A094727, where Q=Pascal's triangle. (See Comments.)

%C For the definition of Q-residue, see A193649.

%F Conjecture: a(n) +(-n-5)*a(n-1) +2*(2*n+1)*a(n-2) +(-5*n+8)*a(n-3) +2*(n-3)

%F *a(n-4)=0. - _R. J. Mathar_, Feb 19 2015

%t q[n_, k_] := n + k + 1;(* A094727 *)

%t r[0] = 1; r[k_] := Sum[q[k - 1, i] r[k - 1 - i], {i, 0, k - 1}]

%t p[n_, k_] := n!/(k! (n - k)!); (* Pascal's triangle *)

%t v[n_] := Sum[p[n, k] r[n - k], {k, 0, n}]

%t Table[v[n], {n, 0, 18}] (* A193659 *)

%t TableForm[Table[q[i, k], {i, 0, 4}, {k, 0, i}]]

%t Table[r[k], {k, 0, 8}] (* A193668 *)

%t TableForm[Table[p[n, k], {n, 0, 4}, {k, 0, n}]]

%Y Cf. A193668, A094727, A193649.

%K nonn

%O 0,2

%A _Clark Kimberling_, Aug 02 2011

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Last modified April 25 06:49 EDT 2024. Contains 371964 sequences. (Running on oeis4.)