OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (7,-21,35,-35,21,-7,1).
FORMULA
G.f.: (1 + 1771554*x + 73365215*x^2 + 324343580*x^3 + 276662415*x^4 + 43325794*x^5 + 531441*x^6)/(1-x)^7. - Bruno Berselli, Jul 30 2011
MATHEMATICA
(10 Range[0, 20]+1)^6 (* or *) LinearRecurrence[{7, -21, 35, -35, 21, -7, 1}, {1, 1771561, 85766121, 887503681, 4750104241, 17596287801, 51520374361}, 20] (* Harvey P. Dale, Feb 08 2020 *)
PROG
(Magma) [(10*n+1)^6: n in [0..20]]; // Vincenzo Librandi, Jul 30 2011
(PARI) for(n=0, 16, print1((10*n+1)^6", ")); \\ Bruno Berselli, Jul 30 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved