OFFSET
1,2
COMMENTS
a(n) is eventually periodic sequence with period (0, 2).
FORMULA
A000203(a(n)) = a(n-1) + 3 for n >= 2.
PROG
(PARI) a(n)=if(n>4, 2-n%2*2, 2*n-1) \\ Charles R Greathouse IV, Feb 14 2013
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
Jaroslav Krizek, Nov 06 2010
STATUS
approved