The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A033450 List of sets of four consecutive primes in arithmetic progression with common difference 18. 2
74453, 74471, 74489, 74507, 76543, 76561, 76579, 76597, 132893, 132911, 132929, 132947, 182243, 182261, 182279, 182297, 202823, 202841, 202859, 202877, 297403, 297421, 297439, 297457, 358793, 358811, 358829, 358847, 485923, 485941, 485959, 485977 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
This is a 4-column table read by rows.
LINKS
MAPLE
a:=[];
for n from 1 to 50000 do
p1:=ithprime(n);
p2:=nextprime(p1);
if (p2-p1)=18 then
p3:=nextprime(p2);
if p3-p2=18 then
p4:=nextprime(p3);
if p4-p3 = 18 then a:=[op(a), p1, p2, p3, p4]; fi;
fi;
fi;
od:
a; # N. J. A. Sloane, Nov 23 2017
MATHEMATICA
Select[Partition[Prime[Range[41000]], 4, 1], Union[Differences[#]]=={18}&]// Flatten (* Harvey P. Dale, Nov 24 2017 *)
CROSSREFS
For the initial primes from each set of four, see A033448.
Sequence in context: A239587 A122065 A079543 * A033448 A234725 A058415
KEYWORD
nonn,tabf
AUTHOR
EXTENSIONS
Confirmed (and last set of four completed) by N. J. A. Sloane, Nov 23 2017
STATUS
approved

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 June 14 02:53 EDT 2024. Contains 373392 sequences. (Running on oeis4.)