OFFSET
1,1
COMMENTS
Largest area of any triangle with integer sides a <= b <= c and inradius n. Triangle has sides (n^2+2, n^4+2n^2+1, n^4+3n^2+1).
LINKS
David W. Wilson, Table of n, a(n) for n = 1..10000
Index entries for linear recurrences with constant coefficients, signature (6, -15, 20, -15, 6, -1).
MAPLE
with(combinat):seq(lcm(fibonacci(4, n), fibonacci(3, n)), n=1..30); # Zerinvary Lajos, Apr 20 2008
MATHEMATICA
LinearRecurrence[{6, -15, 20, -15, 6, -1}, {6, 60, 330, 1224, 3510, 8436}, 30] (* Harvey P. Dale, Aug 14 2023 *)
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
David W. Wilson, Jun 17 2006
STATUS
approved