The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A110413 Integers with mutual residues -3. 0
 4, 7, 25, 697, 487897, 238044946297, 56665396458255748851097, 3210967155771303165846414430093064202724656697 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS This is the special case k=3 of sequences with mutual residues -k. In general, a(1)=k+1 and a(n)=min{m | m>a(n-1), mod(m,a(i))=-k, i=1,...,n-1}. An infinite coprime sequence LINKS S. Mustonen, On integer sequences with mutual k-residues FORMULA a(1)=4, a(2)=7, a(n)=-1+a(1)*a(2)*...*a(n-1) a(n)=a(n)^2+3*a(n)-3, n>3 MAPLE a:=proc(k, n::nonnegint) option remember; if n<3 then RETURN(n*k+1); fi; if n=3 then RETURN(a(k, 1)*a(k, 2)-k); fi; a(k, n-1)*(a(k, n-1)+k)-k; end; seq(a(3, n), n=1..9); CROSSREFS Sequence in context: A219700 A151348 A211942 * A075686 A077441 A269744 Adjacent sequences:  A110410 A110411 A110412 * A110414 A110415 A110416 KEYWORD nonn AUTHOR Seppo Mustonen, Sep 11 2005 STATUS approved

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

Last modified December 1 14:10 EST 2021. Contains 349430 sequences. (Running on oeis4.)