OFFSET
1,2
FORMULA
E.g.f.: (2*x*log(-x^2-2*x+1)+(sqrt(2)-sqrt(2)*x)*log(-((sqrt(2)+1)*x-1) / ((sqrt(2)-1)*x+1)))/(4*(x^2+2*x-1)).
D-finite with recurrence 8*a(n) +16*(-2*n+1)*a(n-1) +(16*n^2-32*n+25)*a(n-2) +4*(8*n^3-36*n^2+47*n-13)*a(n-3) +2*(2*n-5)*(2*n^3-11*n^2+17*n-7)*a(n-4) +4*(n-4)^3*a(n-5) +(n-4)^2*(n-5)^2*a(n-6)=0. - R. J. Mathar, Apr 24 2024
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Kruchinin, Apr 22 2024
STATUS
approved