MathGroup Archive 2009

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how to solve 2-variable recurrence equation for a[m.n]

a[m,n] = a[m-1,n] + a[m-1,n-1] + a[m,n-1]  , m<=n
a[0,0] =1, a[0,n]=1,a[1,1]=2

how to solve?

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