OFFSET
4,1
FORMULA
Conjecture: (n+2)*a(n) +(-5*n-1)*a(n-1) +4*(n-4)*a(n-2) +8*(n-1)*a(n-3) +(-5*n+34)*a(n-4) +3*(-n+7)*a(n-5)=0. - R. J. Mathar, Jun 23 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved