90365

Appears in sequences

• a(n) = n*(Fibonacci(n) - 1) + Fibonacci(n + 2) - 1.at n=18A131412
• a(n) = n*(n+1)*(20*n-17)/6.at n=30A172117
• Number of labeled n-vertex 2-edge multigraphs that are neither crossing nor nesting.at n=31A326247