184318

Appears in sequences

• a(n) = 3*a(n-1) + a(n-2), with a(1)=1 and a(2)=4.at n=10A003688
• Smallest initial value k that reaches 1 in n steps when iterating the map m -> rad(m)-1, where rad(m) is the squarefree kernel of m (A007947).at n=27A075426
• Fixed-k dispersion for Q = 13: array D(g,h) (g, h >= 1), read by ascending antidiagonals.at n=20A120863
• List of quadruples (r,s,t,u): the matrix M = [[4,12,9][2,5,3][1,2,1]] is raised to successive powers, then (r,s,t,u) are the square roots of M[3,1], M[3,3], M[1,1], M[1,3] respectively.at n=45A249579
• Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and column sum not 2 3 6 or 7 and every diagonal and antidiagonal sum 2 3 6 or 7.at n=23A251887
• Array read by antidiagonals: T(m,n) is the number of minimal total dominating sets in the m X n king graph.at n=59A332390
• Array read by antidiagonals: T(m,n) is the number of minimal total dominating sets in the m X n king graph.at n=61A332390