OFFSET
1,3
PROG
(PARI) a(n) = ceil((2^n + 1 - 2*floor(2^(n/2)))/2); \\ Michel Marcus, Aug 07 2020
CROSSREFS
KEYWORD
nonn,easy,less
AUTHOR
Roger L. Bagula, May 15 2007
EXTENSIONS
Edited by Michel Marcus and Joerg Arndt, Aug 07 2020
STATUS
approved