Search: id:A141479
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%I A141479
%S A141479 2,3,3,3,6,18,63,273,1386,7938,50523,353793,2702766,22368258,199360983,
%T A141479 1903757313,19391512146,209865342978,2404879675443,29088885112833,
%U A141479 370371188237526,4951498053124098,69348874393137903,1015423886506852353
%N A141479 A000111(n) + A014695(n).
%C A141479 a(n) is a multiple of 3 for n > 0.
%p A141479 A000111 := proc(n) local x; n!*coeftayl( sec(x)+tan(x),x=0,n) ; end: 
               A014695 := proc(n) local x; coeftayl( (1+2*x+2*x^2+x^3)/(1-x^4),x=0,
               n) ; end: A141479 := proc(n) A000111(n)+A014695(n) ; end: for n from 
               0 to 30 do printf("%a,",A141479(n)) ; od; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Sep 12 2008]
%Y A141479 Sequence in context: A093653 A049982 A070167 this_sequence A055081 A109833 
               A132005
%Y A141479 Adjacent sequences: A141476 A141477 A141478 this_sequence A141480 A141481 
               A141482
%K A141479 nonn,easy
%O A141479 0,1
%A A141479 Paul Curtz (bpcrtz(AT)free.fr), Aug 09 2008
%E A141479 Extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 12 2008

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