OFFSET
0,2
LINKS
Harry J. Smith, Table of n, a(n) for n = 0..200
Index entries for linear recurrences with constant coefficients, signature (20,-160,640,-1280,1024).
FORMULA
G.f.: 4*x*(1+4*x)*(1+40*x+16*x^2) / (1-4*x)^5. - Colin Barker, Apr 30 2013
E.g.f.: 4*x*(1 + 28*x + 96*x^2 + 64*x^3)*exp(4*x). - G. C. Greubel, May 10 2022
MAPLE
MATHEMATICA
f[n_]:=n^4*4^n; f[Range[0, 40]] (* Vladimir Joseph Stephan Orlovsky, Feb 14 2011 *)
PROG
(PARI) for(n=0, 22, print((n^4)*(4^n)))
(PARI) { for (n=0, 200, write("b062075.txt", n, " ", n^4 * 4^n) ) } \\ Harry J. Smith, Jul 31 2009
(SageMath) [4^n*n^4 for n in (0..30)] # G. C. Greubel, May 10 2022
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jason Earls, Jun 27 2001
STATUS
approved