0,1

J. P. McSorley, Counting structures in the Moebius ladder, Discrete Math., 184 (1998), 137-164.

if n mod 2 = 0 then L(n) else L(n)+2; fi; where L() are the Lucas numbers.

A001350(n) + 2.

Sequence in context: A121833 A091606 A027037 this_sequence A158278 A027100 A060840

Adjacent sequences: A020875 A020876 A020877 this_sequence A020879 A020880 A020881

nonn

N. J. A. Sloane (njas(AT)research.att.com).