109520

Appears in sequences

• Triangle read by rows: T(n,k) = Sum_{i=n-k..n} C(k-1,n-i)*C(i,n-k)*C(2*i,i)/(i+1).at n=42A256640
• Number of length n 1..(4+1) arrays with every leading partial sum divisible by 2, 3, 5 or 7.at n=8A258627
• Somos's sequence {b(4,n)} defined in comment in A078495: a(0)=a(1)=...=a(10)=1; for n>=11, a(n)=(a(n-1)*a(n-10)+a(n-5)*a(n-6))/a(n-11).at n=29A271949
• Sum of all the parts in the partitions of n into 7 parts.at n=40A308926
• Expansion of e.g.f. Product_{k>0} (1 + tan(x)^k / k).at n=8A335638