|
| |
|
|
A106002
|
|
a(n)=1 if there is a number of the form 6k+3 such that prime(n) < 6k+3 < prime(n+1), otherwise 0.
|
|
2
| |
|
|
0, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,1
|
|
|
COMMENTS
| Except for first two primes and twin primes, there is always at least one number of the form 6k+3 between two successive primes.
|
|
|
EXAMPLE
| a(3)=0 because between prime(3)=5 and prime(4)=7 there are no numbers of the form 6k+3;
a(4)=1 because between prime(4)=7 and prime(5)=11 there is 9=6*1+3.
|
|
|
CROSSREFS
| Same as A100810 after first term.
Sequence in context: A064911 A174898 A099618 * A066247 A151774 A095792
Adjacent sequences: A105999 A106000 A106001 * A106003 A106004 A106005
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Apr 29 2005
|
|
|
EXTENSIONS
| Edited by Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 17 2006
|
| |
|
|
