A027017 a(n) = T(2*n+1, n+2), T given by A027011.
1, 7, 73, 373, 1404, 4506, 13226, 36889, 99947, 266455, 704150, 1852212, 4860468, 12739243, 33369709, 87385081, 228803856, 599048334, 1568366942, 4106082685, 10749916175, 28143706267, 73681248938, 192900093288, 505019090664, 1322157246031, 3461452722961
Offset: 1
Links
- Colin Barker, Table of n, a(n) for n = 1..1000
- Index entries for linear recurrences with constant coefficients, signature (7,-19,26,-19,7,-1).
Programs
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PARI
Vec(x*(1+43*x^2-31*x^3+17*x^4-7*x^5+x^6)/((1-x)^4*(1-3*x+x^2)) + O(x^40)) \\ Colin Barker, Feb 19 2016
Formula
G.f.: x*(1+43*x^2-31*x^3+17*x^4-7*x^5+x^6) / ((1-x)^4*(1-3*x+x^2)). - Colin Barker, Feb 19 2016