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A092371 Triangle read by rows: T(n,k)=C(n,k)*C(n+k,n-k). 0

%I #7 Mar 30 2012 18:58:55

%S 1,6,1,18,15,1,40,90,28,1,75,350,280,45,1,126,1050,1680,675,66,1,196,

%T 2646,7350,5775,1386,91,1,288,5880,25872,34650,16016,2548,120,1,405,

%U 11880,77616,162162,126126,38220,4320,153,1,550,22275,205920,630630

%N Triangle read by rows: T(n,k)=C(n,k)*C(n+k,n-k).

%F T(n,k)=[x^(n-k)]F(-n,-n-k;1;x); [From _Paul Barry_, Sep 04 2008]

%o (PARI) T(n,k)=binomial(n,k)*binomial(n+k,n-k)

%Y First column = A002411, second column = A001297, main diagonal = 1, second diagonal = A000384.

%Y Cf. A063007.

%K nonn,tabl

%O 1,2

%A _Benoit Cloitre_, Mar 20 2004

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Last modified April 23 08:19 EDT 2024. Contains 371905 sequences. (Running on oeis4.)