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A172013 6*A142459(2*n+1,n)/(n+2). 0

%I

%S 3,118,20343,8530698,6711481694,8575821262764,16243345162977759,

%T 42826533033277249154,150138953276380791799098,

%U 675925071086215282939520628

%N 6*A142459(2*n+1,n)/(n+2).

%F a(n)=6*A142459(2*n+1,n)/(n+2)

%t A[n_, 1] := 1; A[n_, n_] := 1;

%t A[n_, k_] := (4*n - 4*k + 1)A[n - 1, k - 1] + (4*k - 3)A[n - 1, k];

%t a = Table[A[n, k], {n, 20}, {k, n}];

%t Table[6*a[[2*n + 2, n + 1]]/(n + 2), {n, 0, 9}]

%Y A142459,A142458,A172010

%K nonn

%O 0,1

%A _Roger L. Bagula_, Nov 19 2010

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Last modified January 25 16:01 EST 2022. Contains 350572 sequences. (Running on oeis4.)