|
|
A339448
|
|
a(n) = (prime(n) - a(n-1)) mod 3; a(0)=0.
|
|
1
|
|
|
0, 2, 1, 1, 0, 2, 2, 0, 1, 1, 1, 0, 1, 1, 0, 2, 0, 2, 2, 2, 0, 1, 0, 2, 0, 1, 1, 0, 2, 2, 0, 1, 1, 1, 0, 2, 2, 2, 2, 0, 2, 0, 1, 1, 0, 2, 2, 2, 2, 0, 1, 1, 1, 0, 2, 0, 2, 0, 1, 0, 2, 2, 0, 1, 1, 0, 2, 2, 2, 0, 1, 1, 1, 0, 1, 0, 2, 0, 1, 1, 0, 2, 2, 0, 1, 0
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
EXAMPLE
|
a(1) = ( 2 - 0) mod 3 = 2,
a(2) = ( 3 - 2) mod 3 = 1,
a(3) = ( 5 - 1) mod 3 = 1,
a(4) = ( 7 - 1) mod 3 = 0,
a(5) = (11 - 0) mod 3 = 2.
|
|
MATHEMATICA
|
a[0]=0; a[n_]:=Mod[Prime[n]-a[n-1], 3]; Table[a[n], {n, 0, 85}] (* Stefano Spezia, Dec 05 2020 *)
|
|
PROG
|
(Ruby) require 'prime'
values = [0]
Prime.first(50).each do |prime|
values << (prime-values[-1]) % 3
end
p values
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|