OFFSET
1,2
LINKS
Seiichi Manyama, Table of n, a(n) for n = 1..10000
Index entries for linear recurrences with constant coefficients, signature (6,-15,20,-15,6,-1).
FORMULA
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) for n > 6. - Harvey P. Dale, Jan 14 2012
G.f.: (3*(x^3+2*x^2+x))/(x-1)^6. - Harvey P. Dale, Jan 14 2012
a(n) = A061167(n)/10. - Michel Marcus, Sep 04 2013
E.g.f.: exp(x)*x^2*(15 + 25*x + 10*x^2 + x^3)/10. - Stefano Spezia, Dec 27 2021
MATHEMATICA
Table[(n^5 - n)/10, {n, 1, 50}] (* Stefan Steinerberger, Sep 03 2009 *)
LinearRecurrence[{6, -15, 20, -15, 6, -1}, {0, 3, 24, 102, 312, 777}, 50] (* Harvey P. Dale, Jan 14 2012 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Bill Welsh (bill.welsh.75(AT)gmail.com), Aug 31 2009
EXTENSIONS
More terms from Stefan Steinerberger, Sep 03 2009
STATUS
approved