A110392 a(n) = L((2n+1)^2)/L(2n+1), where L(n) = Lucas Number.

1, 19, 15251, 599786069, 1114769987764201, 97420733208491869044199, 400012422749007152825031617346281, 77162215003721161199201918848868019810593999

Offset

0,2

Comments

Subsidiary sequence : L((2n+1)*n)/L(n).

Links

Table of n, a(n) for n=0..7.

Example

a(2) = L(25)/L(5) = 167761/11 = 15251.

Maple

with(combinat): seq((2*fibonacci((2*n+1)^2+1)-fibonacci((2*n+1)^2))/(2*fibonacci(2*n+2)-fibonacci(2*n+1)), n=0..9); # Emeric Deutsch, Jul 31 2005

Crossrefs

Cf. A000204.

Sequence in context: A357252 A186165 A198412 * A107100 A233233 A203581

Adjacent sequences: A110389 A110390 A110391 * A110393 A110394 A110395

Keyword

easy,nonn

Author

Amarnath Murthy, Jul 27 2005

Extensions

More terms from Emeric Deutsch, Jul 31 2005

Status

approved