OFFSET
0,1
LINKS
Harvey P. Dale, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1).
FORMULA
G.f.: (14 - 28*x + 20*x^2 - 5*x^3)/(1 - x)^6.
a(n)=A115127(n+4, 4), n>=1.
a(0)=14, a(1)=56, a(2)=146, a(3)=311, a(4)=586, a(5)=1015, a(n)= 6*a(n-1)- 15*a(n-2)+ 20*a(n-3)-15*a(n-4)+6*a(n-5)-a(n-6). - Harvey P. Dale, Apr 24 2016
MATHEMATICA
LinearRecurrence[{6, -15, 20, -15, 6, -1}, {14, 56, 146, 311, 586, 1015}, 40] (* or *) CoefficientList[Series[(14-28x+20x^2-5x^3)/(1-x)^6, {x, 0, 40}], x] (* Harvey P. Dale, Apr 24 2016 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Wolfdieter Lang, Jan 13 2006
STATUS
approved