OFFSET
0,2
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..1000
Index entries for linear recurrences with constant coefficients, signature (16, -62).
FORMULA
a(n) = ((2+sqrt(2))*(8+sqrt(2))^n + (2-sqrt(2))*(8-sqrt(2))^n)/4.
G.f.: (1-7*x)/(1-16*x+62*x^2).
E.g.f.: (1/2)*exp(8*x)*(2*cosh(sqrt(2)*x) + sqrt(2)*sinh(sqrt(2)*x)). - G. C. Greubel, Dec 24 2016
MATHEMATICA
LinearRecurrence[{16, -62}, {1, 9}, 30] (* Harvey P. Dale, Jul 13 2014 *)
PROG
(Magma) [ n le 2 select 8*n-7 else 16*Self(n-1)-62*Self(n-2): n in [1..19] ];
(PARI) Vec((1-7*x)/(1-16*x+62*x^2) + O(x^50)) \\ G. C. Greubel, Dec 24 2016
CROSSREFS
KEYWORD
nonn
AUTHOR
Klaus Brockhaus, Jul 28 2009
STATUS
approved