OFFSET
0,1
LINKS
Karl Dienger, Beiträge zur Lehre von den arithmetischen und geometrischen Reihen höherer Ordnung, Jahres-Bericht Ludwig-Wilhelm-Gymnasium Rastatt, Rastatt, 1910. [Annotated scanned copy]
FORMULA
Conjecture: -6*n*(3*n+5)*a(n) +(n+5)*(n+4)*(3*n+8)*(n+3)^2*a(n-1)=0. - R. J. Mathar, Jul 15 2015
MAPLE
rXI := proc(n, a, d)
n*(n+1)*(n+2)/6*a+(n+2)*(n+1)*n*(n-1)/24*d;
end proc:
A259463 := proc(n)
mul(rXI(i, a, d), i=1..n+2) ;
coeftayl(%, d=0, 2) ;
coeftayl(%, a=0, n) ;
end proc:
seq(A259463(n), n=1..25) ; # R. J. Mathar, Jul 15 2015
MATHEMATICA
rXI[n_, a_, d_] := n(n+1)(n+2)/6 a + (n+2)(n+1)n(n-1)/24 d;
A259463[n_] := Product[rXI[i, a, d], {i, 1, n+3}]//
SeriesCoefficient[#, {d, 0, 2}]&//
SeriesCoefficient[#, {a, 0, n+1}]&;
CROSSREFS
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Jun 30 2015
EXTENSIONS
Corrected by Jean-François Alcover, May 02 2023
STATUS
approved