127909

Appears in sequences

• a(n) = (3*n-1)*(n^4-18*n^3+179*n^2-582*n+720)/120.at n=24A381193
• a(n) = Sum_{k=0..floor((2*n+1)/7)} binomial(2*k+1,2*n-7*k+1).at n=38A392488