Search: id:A062081
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%I A062081
%S A062081 4,120,55440,42325920,7210803600,43790142876480,6338767304469600,
%T A062081 659267412349963697280,1688424674909818263818400,
%U A062081 2043724034861836818744052800,9347568224452825219277416992000
%N A062081 Group the even numbers as (2,4), (6,8,10,12), (14,16,18,20,22,24), (26,
               28,30,32,34,36,38,40),... then a(n) = LCM of the n-th group.
%H A062081 Harry J. Smith, <a href="b062081.txt">Table of n, a(n) for n=1,...,100</
               a>
%e A062081 a(2) = LCM (6,8,10,12) =120.
%o A062081 (PARI) for(n=1,20,p=1:forstep(k=2*(n^2-n+1),2*(n^2+n),2,p=lcm(p,k)):print1(p",
               "))
%o A062081 (PARI) { for (n=1, 100, a=b=2*n^2 - 2*n + 2; for (k=1, 2*n - 1, a=lcm(a, 
               b + 2*k)); write("b062081.txt", n, " ", a) ) } [From Harry J. Smith 
               (hjsmithh(AT)sbcglobal.net), Jul 31 2009]
%Y A062081 Sequence in context: A001332 A071304 A006607 this_sequence A053881 A075114 
               A017186
%Y A062081 Adjacent sequences: A062078 A062079 A062080 this_sequence A062082 A062083 
               A062084
%K A062081 nonn
%O A062081 1,1
%A A062081 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jun 15 2001
%E A062081 Corrected and extended by Ralf Stephan (ralf(AT)ark.in-berlin.de), Mar 
               20 2003

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