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Second beta integer combination triangle of a Narayana type: a=3:f(n, a) = a*f(n - 1, a) + f(n - 2, a);c(n,a)=If[n == 0, 1, Product[f(i, a), {i, 1, n}]];w(n,m,q)=c(n - 1, q)*c(n, q)/(c(m - 1, q)*c(n - m, q)*c(m - 1, q)*c(n - m + 1, q)*f(m, q))
(history; published version)
#2 by Russ Cox at Fri Mar 30 17:34:38 EDT 2012
AUTHOR

_Roger L. Bagula (rlbagulatftn(AT)yahoo.com), _, Feb 01 2010

Discussion
Fri Mar 30
17:34
OEIS Server: https://oeis.org/edit/global/158
#1 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010
NAME

Second beta integer combination triangle of a Narayana type: a=3:f(n, a) = a*f(n - 1, a) + f(n - 2, a);c(n,a)=If[n == 0, 1, Product[f(i, a), {i, 1, n}]];w(n,m,q)=c(n - 1, q)*c(n, q)/(c(m - 1, q)*c(n - m, q)*c(m - 1, q)*c(n - m + 1, q)*f(m, q))

DATA

1, 1, 1, 1, 10, 1, 1, 110, 110, 1, 1, 1199, 13189, 1199, 1, 1, 13080, 1568292, 1568292, 13080, 1, 1, 142680, 186625440, 2034217296, 186625440, 142680, 1, 1, 1556401, 22206729468, 2640582013104, 2640582013104, 22206729468, 1556401, 1, 1

OFFSET

1,5

COMMENTS

Row sums are:

{1, 2, 12, 222, 15589, 3162746, 2407753538, 5325580597948, 44250590408026536,

1067713385571585752220,...}

FORMULA

a=3:

f(n, a) = a*f(n - 1, a) + f(n - 2, a);

c(n,a)=If[n == 0, 1, Product[f(i, a), {i, 1, n}]];

w(n,m,q)=c(n - 1, q)*c(n, q)/(c(m - 1, q)*c(n - m, q)*c(m - 1, q)*c(n - m + 1, q)*f(m, q))

EXAMPLE

{1},

{1, 1},

{1, 10, 1},

{1, 110, 110, 1},

{1, 1199, 13189, 1199, 1},

{1, 13080, 1568292, 1568292, 13080, 1},

{1, 142680, 186625440, 2034217296, 186625440, 142680, 1},

{1, 1556401, 22206729468, 2640582013104, 2640582013104, 22206729468, 1556401, 1},

{1, 16977730, 2642415594973, 3427453246279524, 37390399050322080, 3427453246279524, 2642415594973, 16977730, 1},

{1, 185198630, 314425233650990, 4448834073451222609, 529407544286922803880, 529407544286922803880, 4448834073451222609, 314425233650990, 185198630, 1}

MATHEMATICA

Clear[t, n, m, c, q, w, f, a] f[0, a_] := 0; f[1, a_] := 1;

f[n_, a_] := f[n, a] = a*f[n - 1, a] + f[n - 2, a];

c[n_, a_] := If[n == 0, 1, Product[f[i, a], {i, 1, n}]];

w[n_, m_, q_] := c[n - 1, q]*c[n, q]/(c[m - 1, q]*c[n - m, q]*c[m - 1, q]*c[n - m + 1, q]*f[m, q]);

Table[Table[Table[w[n, m, q], {m, 1, n}], {n, 1, 10}], {q, 1, 12}];

Table[Flatten[Table[Table[w[n, m, q], {m, 1, n}], {n, 1, 10}]], {q, 1, 12}]

KEYWORD

nonn,uned

AUTHOR

Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Feb 01 2010

STATUS

approved