A076604 a(1) = 11, a(n_even) = (a(n-1)^2-1)/2; a(n_odd) = a(n-1)+1.

11, 60, 61, 1860, 1861, 1731660, 1731661, 1499324909460, 1499324909461, 1123987592065117923655260, 1123987592065117923655261, 631674053558170970207436821512098200057586489060

Offset: 1

Author

Zak Seidov, Oct 21 2002

Keywords

• easy
• nonn

Comments

{11, 60, 61}, {61, 1860, 1861}, {1861, 1731660, 1731661}... are sides {a

Extensions

a(12) from Lars Blomberg, Oct 08 2008

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.