OFFSET
0,2
COMMENTS
Column k=5 of A242464.
LINKS
Fung Lam, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (3, 5, 12, 17, 24, 24, 25, 19, 14, 7, 4).
FORMULA
G.f.: (1 + x)*(1 +x^2)*(1 - x + x^2)*(1 + x + x^2)*(1 + x + x^2 + x^3 + x^4)/(1 - 3*x - 5*x^2 - 12*x^3 - 17*x^4 - 24*x^5 - 24*x^6 - 25*x^7 - 19*x^8 - 14*x^9 - 7*x^10 - 4*x^11).
MATHEMATICA
nn=23; CoefficientList[Series[1/(1-Sum[v[i]/(1+v[i])/.v[i]->(z-z^(i+1))/(1-z), {i, 1, 5}]), {z, 0, nn}], z]
LinearRecurrence[{3, 5, 12, 17, 24, 24, 25, 19, 14, 7, 4}, {1, 5, 24, 115, 550, 2631, 12584, 60191, 287901, 1377066, 6586677, 31504891}, 30] (* Harvey P. Dale, Apr 13 2019 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Geoffrey Critzer and Alois P. Heinz, May 16 2014
STATUS
approved