OFFSET
1,2
LINKS
Index entries for linear recurrences with constant coefficients, signature (323,-323,1).
FORMULA
a(n) = A049683(2*n-1) = (1/16) * (Lucas(12*n-6) - 2). - Joerg Arndt, Apr 09 2023
From Chai Wah Wu, Apr 17 2024: (Start)
a(n) = 323*a(n-1) - 323*a(n-2) + a(n-3) for n > 3.
G.f.: x*(-x^2 - 38*x - 1)/((x - 1)*(x^2 - 322*x + 1)). (End)
PROG
(PARI) for(n=1, 10^8, x=(5*n*(n-1)+1); if(issquare(x), print(x)))
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jason Earls, Jul 19 2001
EXTENSIONS
More terms from Sean A. Irvine, Apr 08 2023
STATUS
approved