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v[1] = 1; for(n = 1, N, my(i = n + 1); v[i] = (-(216*n^3 - 684*n^2 - 156*n + 264 + (486*n^3 - 1890*n^2 - 1368*n + 1656)*x + (81*n^2 - 2997*n + 2646)*x^2 + (729*n^2 - 1377*n - 405)*x^3 - 1944*x^4 - 729*x^5)*v[i - 1] + (144*n^2 + 48*n - 32 + (864*n^2 + 648*n - 168)*x + (1458*n^2 + 2862*n + 252)*x^2 + (486*n^2 + 5103*n + 2943)*x^3 + (3402*n + 5751)*x^4 + (729*n + 3645)*x^5 + 729*x^6)*deriv(v[i - 1], x))/(108*n^2 - 36*n + (162*n^3 + 54*n^2 - 36*n)*x + (405*n^2 - 459*n)*x^2 + 243*n^2*x^3 + 243*n*x^4)); v};\nrow(n, p) = {my(c = Vecrev(p)); c};\nT(N) = {my(v = P(N)); concat(vector(#v, i, row(i - 1, v[i])))};\nT(9)","reading":{"first_row":0,"offset":0,"reversed":false,"trim_zeros":"none","regular_triangle":false}}],"derivation":{"root":"n-e00a1cb428776eaa","steps":["basis A013610","D+1"],"edges":["e-470609786340cbfa","e-d109cd337bdc066c"],"text":"delannoy \u2192 basis A013610 \u2192 D+1"},"headline":"delannoy \u2192 basis A013610 \u2192 D+1","chain":null}