login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A078860 Least positive residues [mod 210] representing those residue classes which can be lesser of prime pairs from A029710. 2

%I #4 Oct 15 2013 22:31:46

%S 7,13,19,37,43,67,79,97,103,109,127,139,163,169,187,193

%N Least positive residues [mod 210] representing those residue classes which can be lesser of prime pairs from A029710.

%F Intersection[RRS(210), 4+RRS{210)]-4 and {7}. RRS[210]=reduced residue system of 210=first 48=phi[210] terms of A008364; additional term 7 is a singular cases; 210k+r generates complete A029710 with suitable k and r taken from these 15+1 numbers.

%t t=Flatten[Position[Table[GCD[w, 210], {w, 1, 210}], 1]] t2=Intersection[t, t+4]-4

%Y Cf. A029710, A008364, A078859.

%K fini,full,nonn

%O 1,1

%A _Labos Elemer_, Dec 13 2002

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified May 9 18:53 EDT 2024. Contains 372354 sequences. (Running on oeis4.)