53983

Appears in sequences

• a(n) = (2*n^3 + 5*n^2 - 5*n)/2.at n=36A162265
• a(n) = (4*n + 3)*(1 + 2*n^2)/3.at n=27A168574
• Sequence defined by the recurrence formula a(n+1)=sum(a(p)*a(n-p)+k,p=0..n)+l for n>=1, with here a(0)=1, a(1)=1, k=-1 and l=-1.at n=12A176953