111925

Appears in sequences

• Second diagonal of A027517.at n=9A027523
• Weighted tribonacci (1,2,4), companion to A102001.at n=12A102002
• a(n) = n^2 * (n+1)^2 * (n^2+n+1) / 12.at n=10A331528
• Triangle read by rows: T(n,k) is the number of maximal chains in the poset of all k-ary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.at n=44A378588
• Number of maximal chains in the poset of all n-ary words of length <= n, ordered by B covers A iff A_i <= B_{i+k} for all i in A and some k >= 0.at n=9A378608
• a(n) = Sum_{k=0..n} (-1)^k * binomial(n+2*k,n-k) * Fibonacci(k+1).at n=14A390855