Search: id:A138803
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%I A138803
%S A138803 0,1,3,8,20,47,105,224,456,881,1595,2632,3692,3359,2927,27776,103088,
%T A138803 304607,803149,1966392,4549884,10029361,21114759,42375200,80491880,
%U A138803 142437359,226667157,294543992,191015460,556551487,3216934945
%V A138803 0,1,3,8,20,47,105,224,456,881,1595,2632,3692,3359,-2927,-27776,-103088,
               -304607,
%W A138803 -803149,-1966392,-4549884,-10029361,-21114759,-42375200,-80491880,-142437359,
%X A138803 -226667157,-294543992,-191015460,556551487,3216934945
%N A138803 Imaginary parts of terms (1,1), (2,2) of matrix [1,(1+I); 1,1]^n.
%F A138803 Imaginary parts of upper left and lower right terms of matrix [1,(1+I); 
               1,1]^n; I^2 = -1.
%e A138803 a(6) = 47 since the sixth power of the matrix generator = [(14,47); (-6,
               58); (26,32); (14,47)]; where (14,47) = (14 + 47*I).
%Y A138803 Sequence in context: A026690 A036676 A101533 this_sequence A048492 A006776 
               A050231
%Y A138803 Adjacent sequences: A138800 A138801 A138802 this_sequence A138804 A138805 
               A138806
%K A138803 sign
%O A138803 1,3
%A A138803 Gary W. Adamson (qntmpkt(AT)yahoo.com), Mar 30 2008

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