547338

Appears in sequences

• Number of permutations of an n-sequence discordant with three given permutations (see reference) in n-7 places.at n=4A000500
• a(n)=the sum of the (1,2)- and (1,3)-entries and twice the (1,4)-entry of the matrix P^n + T^n, where the 4 X 4 matrices P and T are defined by P=[0,1,0,0;0,0,1,0;0,0,0,1;1,0,0,0] and T=[0,1,0,0;0,0,1,0;0,0,0,1;1,1,1,1].at n=22A109525