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!)
A366673 a(n) is the least triprime k such that k + n is the next triprime after k. 1
27, 18, 63, 8, 45, 12, 20, 130, 138, 154, 52, 30, 561, 78, 1194, 1930, 4277, 292, 5343, 26353, 4255, 7847, 34773, 18628, 71718, 72308, 168114, 64699, 43209, 227451, 239643, 17641, 97061, 162124, 924718, 930311, 488001, 7248711, 2986751, 704908, 4108654, 7220012 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
EXAMPLE
a(3) = 63 because 63 = 3^2 * 7 is a triprime and the next triprime is 63 + 3 = 66 = 2 * 3 * 11.
MAPLE
T:= select(t -> numtheory:-bigomega(t) = 3, [$1..10^7]):
dT:= T[2..-1]-T[1..-2]:
V:= Vector(42):
for i from 1 to nops(dT) do
if dT[i] <= 42 and V[dT[i]] = 0 then V[dT[i]]:= T[i] fi
od:
convert(V, list);
CROSSREFS
Sequence in context: A105325 A277270 A040704 * A182141 A346384 A247434
KEYWORD
nonn
AUTHOR
Zak Seidov and Robert Israel, Oct 16 2023
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 July 13 04:46 EDT 2024. Contains 374267 sequences. (Running on oeis4.)