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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
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
KEYWORD
nonn
AUTHOR
Seppo Mustonen, Sep 11 2005
STATUS
approved

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Last modified April 24 05:23 EDT 2024. Contains 371918 sequences. (Running on oeis4.)