OFFSET
2,2
FORMULA
Conjecture: -(n+7)*(31*n-87)*a(n) +(164*n^2+313*n-2115)*a(n-1) +(-182*n^2+229*n+891)*a(n-2) +(-164*n^2+59*n+519)*a(n-3) +3*(71*n-104)*(n-3)*a(n-4)=0. - R. J. Mathar, Jun 23 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved