OFFSET
0,5
LINKS
Index entries for linear recurrences with constant coefficients, signature (5,-10,10,-4,1).
FORMULA
G.f.: (1-x)^4/((1-x)^5-x^4); a(n)=sum{k=0..floor(5n/4), binomial(k, 5n-4k)}; a(n)=A017827(5n).
a(n)=sum{k=0..floor((n+1)/2), binomial(n+k, 5k)}; - Paul Barry, May 09 2005
MATHEMATICA
LinearRecurrence[{5, -10, 10, -4, 1}, {1, 1, 1, 1, 2}, 32] (* Jean-François Alcover, Sep 21 2017 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Paul Barry, Sep 29 2004
STATUS
approved