111150

Appears in sequences

• a(n) = n*(n+1)*(n+2)*(n+7)/24.at n=38A005582
• a(n) = n^4 + n^3 + n^2 + n.at n=18A027445
• a(n) = n*(n-1)*(n+1)*(3*n-2)/12.at n=25A153978
• a(0)=0, a(1)=1, a(2n)=18*a(n), a(2n+1)=a(2n)+1.at n=30A197352
• Principal diagonal of the convolution array A213819.at n=37A213820