OFFSET
0,3
LINKS
FORMULA
a(n) = n XOR floor(n/4) XOR floor(n/16). - Ivan Neretin, Sep 06 2017
PROG
(Python)
def A100281(n): return n^(m:=n>>2)^(m>>2) # Chai Wah Wu, Jan 19 2023
CROSSREFS
KEYWORD
nonn,look
AUTHOR
Reinhard Zumkeller, Nov 11 2004
STATUS
approved