229656

Appears in sequences

• a(n) = 5*a(n-1) + 4*a(n-2) with a(1)=5, a(2)=4.at n=7A189748
• Irregular triangular array read by rows T(n,k) is the number of 2-colored labeled graphs that have exactly k edges, n >= 2, 0 <= k <= A033638(n).at n=51A201143