1089088

Appears in sequences

• a(n) = 7*(n+1)*binomial(n+2,7)/2.at n=10A027780
• a(n) = 11*(n+1)*binomial(n+2,11)/2.at n=6A027784
• Maximum number of copies of a 12345 permutation pattern in an alternating (or zig-zag) permutation of length n + 7.at n=38A339355
• a(n) = Sum_{k=0..floor(n/3)} (k+1) * 2^k * 3^(n-3*k) * binomial(2*k,2*(n-3*k)).at n=18A390781