0,2

INRIA Algorithms Project, Encyclopedia of Combinatorial Structures 188

Index entries for Molien series

[ n(n-1)/10 ].

G.f.: 1/((1-x)^2*(1-x^5)).

a(n)=a(n-5)+n+1. - Paul Barry (pbarry(AT)wit.ie), Jul 14 2004

a(n) = sum(floor(j/5), {j,0,n+5}), a(n-5) = (1/2)floor(n/5)*(2n-3-5*floor(n/5)) [From Mitch Harris (maharri(AT)gmail.com), Sep 08 2008]

1/((1-x)^2*(1-x^5));

Adjacent sequences: A008729 A008730 A008731 this_sequence A008733 A008734 A008735

Sequence in context: A024926 A051532 A135785 this_sequence A130520 A005706 A064175

nonn,new

njas