OFFSET
0,1
COMMENTS
This GCD is 1163 if k == 435 (mod 1163), or 1 otherwise.
LINKS
FORMULA
a(n) = 435 + 1163*n.
a(n) = 2*a(n-1) - a(n-2).
G.f.: (435 + 728*x)/(1 - x)^2.
EXAMPLE
a(0) = 435, 2*435^7+1 = 5894606169966093751 and 3*435^3+2 = 246938627, gcd(5894606169966093751, 246938627) = 1163.
MATHEMATICA
Table[435+n*1163, {n, 0, 37}] (* James C. McMahon, Jan 15 2024 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Philippe Deléham, Jan 15 2024
STATUS
approved