699840

Appears in sequences

• Triangle read by rows: T(n,k) = binomial(n,k)*6^(n-k)*6^k, 0<=k<=n.at n=23A038260
• Triangle read by rows: T(n,k) = binomial(n,k)*6^(n-k)*6^k, 0<=k<=n.at n=25A038260
• a(n) = 3^n*n!*(n+2)!/2!.at n=4A064633
• a(n) is the number of shapes of balanced trees with constant branching factor 6 and n nodes. The node is balanced if the size, measured in nodes, of each pair of its children differ by at most one node.at n=14A131892
• Triangle interpolating between the subsets of an n-set (A000079) and the trees on n labeled nodes (A000272) (read by rows).at n=25A154715
• Molecular topological indices of the complete tripartite graphs K_{n,n,n}.at n=26A192491
• Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=4A236991
• Number of (n+1)X(5+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=1A236994
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=16A236997
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one.at n=19A236997
• Coefficients in expansion of Eisenstein series -q*(d/dq)(q*(d/dq)E_2).at n=27A282154