187675644

Appears in sequences

• a(n) = T(n, n-1), T given by A026519. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 1.at n=23A026521
• a(n) = T(n,n-1), T given by A026536. Also a(n) = number of integer strings s(0), ..., s(n), counted by T, such that s(n) = 1.at n=23A026538
• a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A026519.at n=11A027263
• a(n) = Sum_{k=0..2n-1} T(n,k) * T(n,k+1), with T given by A026536.at n=11A027268