OFFSET
0,1
LINKS
K. J. Ramsey, Recursive Series Problem [Edited by Kenneth J. Ramsey, May 14 2011]
Kenneth J. Ramsey, Recursive Series Problem, digest of 4 messages in Triangular_and_Fibonacci_Numbers Yahoo group, May 28, 2005 - Mar 9, 2006. [Cached copy]
Index entries for linear recurrences with constant coefficients, signature (7, -7, 1).
FORMULA
a(n) = 6*a(n-1) - a(n-2) - 6.
G.f.: (-4*x^2+13*x-3)/(x^3-7*x^2+7*x-1). [Harvey P. Dale, Mar 15 2011]
EXAMPLE
a(4) = 1275 as 220*1275 = 280500 is a term of A046092.
MATHEMATICA
Transpose[NestList[{Last[#], 6Last[#]-First[#]-6}&, {3, 8}, 20]][[1]] (* Harvey P. Dale, Mar 15 2011 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Kenneth J Ramsey, May 29 2005
EXTENSIONS
More terms from Harvey P. Dale, Mar 15 2011
STATUS
approved