A119364 - OEIS

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A119364

Central coefficients of number triangle A119335.

%I #2 Mar 30 2012 18:59:15

%S 0,1,1,1,11,81,351,1149,3529,12601,52724,222641,879308,3295384,

%T 12303201,47320365,186738507,739129809,2894481813,11237844615,

%U 43647142533,170543919327,669744238998,2633027605209,10337488816041,40544676533466

%N Central coefficients of number triangle A119335.

%C A119363(n)-a(n)=A119365(n).

%F a(n)=sum{k=0..n-1, C(n+1,3k)*C(n-1,3k)}; a(n)=A119335(2n,n+1).

%K easy,nonn

%O 0,5

%A _Paul Barry_, May 16 2006