282468

Appears in sequences

• a(n) = 2*a(n-1) + a(floor(n/2)), with a(1) = 1, a(2) = 2.at n=17A033490
• a(n) = 10000*n + 2468.at n=28A102689
• a(n) = Sum_{i=0..n/2}((binomial(2*i+1,i)*binomial(2*n+2,n-2*i))/(2*i+1)).at n=9A270560