168828

Appears in sequences

• Four-column array read by rows: T(n,k) for k=0..3 is the k-th component of the vector obtained by multiplying the n-th power of the 4 X 4 matrix (1,1,1,1; 7,3,1,0; 12,2,0,0; 6,0,0,0) and the vector (1,1,1,1).at n=26A095797
• The number of endomorphisms of the symmetric inverse monoid on the set {1..n}.at n=8A226466