Search: id:A038396
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%I A038396
%S A038396 2,42,642,8642,108642,12108642,1412108642,161412108642,18161412108642,
%T A038396 2018161412108642,222018161412108642,24222018161412108642,
%U A038396 2624222018161412108642
%N A038396 Concatenate first n even numbers in reverse order.
%D A038396 M. Bencze, L.Tutescu, Some Notions and Questions in Number Theory, Sequence 
               4.
%H A038396 M. L. Perez et al., eds., <a href="http://www.gallup.unm.edu/~smarandache/
               ">Smarandache Notions Journal</a>
%F A038396 a(n)=(2*n)*10^floor{1+log10[a(n-1)]}+a(n-1), with a(1)=2 - Paolo P. Lava 
               (ppl(AT)spl.at), Jun 19 2008
%p A038396 P:=proc(i) local a,n; a:=2; print(a); for n from 2 by 1 to i do a:=2*n*10^floor(evalf(1+log10(a),
               100))+a ; print(a); od; end: P(100); - Paolo P. Lava (ppl(AT)spl.at), 
               Jun 19 2008
%Y A038396 Sequence in context: A070808 A157056 A140170 this_sequence A162678 A124103 
               A152286
%Y A038396 Adjacent sequences: A038393 A038394 A038395 this_sequence A038397 A038398 
               A038399
%K A038396 nonn,base
%O A038396 0,1
%A A038396 M.I.Petrescu (mipetrescu(AT)yahoo.com)

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