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%I #2 Mar 30 2012 18:59:01
%S 1,3,25,243,2425,24243,242425,2424243,24242425,242424243,2424242425,
%T 24242424243,242424242425,2424242424243,24242424242425,
%U 242424242424243,2424242424242425,24242424242424243,242424242424242425
%N Related to the Herschel graph.
%C Binomial transform is A099912.
%F G.f. : (1-7x-6x^2)/((1-x^2)(1-10x)); a(n)=10a(n-1)+a(n-2)-10a(n-3); a(n)=(-1)^n/11+8*10^n/33+2/3.
%K easy,nonn
%O 0,2
%A _Paul Barry_, Oct 30 2004
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