OFFSET
0,2
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..10000
Index entries for linear recurrences with constant coefficients, signature (4,-6,4,-1)
FORMULA
G.f.: (1 + 725*x + 2003*x^2 + 343*x^3)/(x-1)^4. - R. J. Mathar, Jul 14 2016
Sum_{n>=0} 1/a(n) = -psi''(1/8)/1024 = 1.0017122... - R. J. Mathar, May 07 2024
MATHEMATICA
Table[(8n+1)^3, {n, 0, 30}] (* or *) LinearRecurrence[{4, -6, 4, -1}, {1, 729, 4913, 15625}, 30] (* Harvey P. Dale, Sep 04 2024 *)
PROG
(Magma) [(8*n+1)^3: n in [0..40]]; // Vincenzo Librandi, Jul 11 2011
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
STATUS
approved