%I A119880
%S A119880 1,2,3,2,3,2,63,2,1383,2,50523,2,2702763,2,199360983,2,19391512143,2,2404879675443,
%T A119880 2,370371188237523,2,69348874393137903,2,15514534163557086903,2,
%U A119880 4087072509293123892363,2,1252259641403629865468283,2,441543893249023104553682823
%V A119880 1,2,3,2,-3,2,63,2,-1383,2,50523,2,-2702763,2,199360983,2,-19391512143,
               2,2404879675443,
%W A119880 2,-370371188237523,2,69348874393137903,2,-15514534163557086903,2,
%X A119880 4087072509293123892363,2,-1252259641403629865468283,2,441543893249023104553682823
%N A119880 E.g.f. exp(2x)sech(x).
%C A119880 Transform of 2^n under the matrix A119879.
%F A119880 a(n)=sum{k=0..n, A119879(n,k)2^k}
%Y A119880 Sequence in context: A015886 A108656 A164962 this_sequence A075019 A138960 
               A115397
%Y A119880 Adjacent sequences: A119877 A119878 A119879 this_sequence A119881 A119882 
               A119883
%K A119880 easy,sign
%O A119880 0,2
%A A119880 Paul Barry (pbarry(AT)wit.ie), May 26 2006