27313650

Appears in sequences

• a(n) = number of (s(0), s(1), ..., s(2n)) such that s(i) is a nonnegative integer and |s(i) - s(i-1)| = 1 for i = 1,2,...,n, s(0) = 3, s(2n) = 7. Also a(n) = T(2n,n-2), where T is defined in A026022.at n=12A026031
• a(n) = (3*n+4)*binomial(n+7, 7)/4.at n=22A054487
• Twelfth column of Losanitsch's triangle A034851 (formatted as lower triangular matrix).at n=19A062136
• Maximum over 0 <= k <= n/2 of the number of permutations of two symbols occurring k and n-2*k times, respectively, where a permutation and its reversal are counted only once.at n=41A362260