Search: id:A109847
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%I A109847
%S A109847 8,14,6,20,20,6,14,8,0,890,88,348,1118,1190,420,1328,1394,162,1520,1580,
%T A109847 546,154,1748,600,1850,1898,216,1988,2030,690,2108,2144,66,2210,2240,
%U A109847 252,2294,2318,780,2360,2378,798,2408,220,270,2438,2444,816,2450,2450
%N A109847 Least common multiple of n and its 9's complement.
%e A109847 a(2)=14 because 7=9-2 and lcm(2,7)=14
%e A109847 a(9)=lcm(0,9)=0. a(10)=lcm(89,10)=890.
%p A109847 digs := proc(inp::integer) local resul,shiftinp : resul := 1 : shiftinp 
               := iquo(inp,10) : while shiftinp > 0 do resul := resul+1 : shiftinp 
               := iquo(shiftinp,10) : od : RETURN(resul) : end: nin := proc(inp::integer) 
               RETURN(10^digs(inp)-1-inp) : end : for n from 1 to 40 do comp := 
               nin(n) ; #print(n,comp,lcm(n,comp)) ; printf("%d,",lcm(n,comp)) ; 
               od : - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 27 2006
%Y A109847 Cf. A109848, A084021.
%Y A109847 Sequence in context: A081966 A166670 A107764 this_sequence A122459 A092537 
               A082772
%Y A109847 Adjacent sequences: A109844 A109845 A109846 this_sequence A109848 A109849 
               A109850
%K A109847 base,easy,nonn
%O A109847 1,1
%A A109847 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jul 06 2005
%E A109847 Corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Mar 27 2006
%E A109847 More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), 
               May 03 2006

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