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!)
A026452 a(n) = least positive integer > a(n-1) and not a(i)*a(j)+2 for i<=1<=j<=n. 2
3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16, 19, 21, 24, 25, 28, 31, 33, 35, 36, 39, 40, 43, 45, 46, 48, 49, 53, 55, 57, 60, 61, 63, 64, 68, 69, 70, 71, 73, 75, 76, 79, 81, 84, 85, 87, 88, 89, 90, 91, 94, 96, 99, 100, 103, 104, 105, 108, 109 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
a = {3, 4}; used = {a[[1]]^2 + 2, a[[1]]*a[[2]] + 2, a[[2]]^2 + 2}; Do[k = a[[-1]] + 1; While[MemberQ[used, k], k++]; AppendTo[a, k]; used = Union[used, k*a + 2], {n, 3, 60}]; a (* Ivan Neretin, Mar 06 2016 *)
CROSSREFS
Cf. A026443 and references therein.
Sequence in context: A299532 A026432 A026436 * A271928 A039157 A234321
KEYWORD
nonn
AUTHOR
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 May 26 09:40 EDT 2024. Contains 372824 sequences. (Running on oeis4.)