22480

Appears in sequences

• a(n)=the (1,2)-entry of the n-th power of the 2 X 2 matrix [0,1;n-1,3(n-1)].at n=4A109518
• Number of base 30 circular n-digit numbers with adjacent digits differing by 5 or less.at n=4A125393
• Coefficient triangle sequence of a polynomial recursion: p(x,n)=(x + 1)*(p(x, n - 1) + 3^(n - 1)*x); Row sums are 2*3^n.at n=58A153310
• a(n) = p(n+1)^2 + 2*p(n) + 1; p(n) is the n-th prime number and n >= 1.at n=33A155819
• a(n) = 225*n^2 - 2*n.at n=9A158226
• Number of right triangles on a (n+1) X 4 grid.at n=39A189808
• Number of ways to place n nonattacking composite pieces queen + rider[3,4] on an n X n chessboard.at n=14A189879
• y-values in the solutions to x^2 + 999 = y^3.at n=5A248481
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 99", based on the 5-celled von Neumann neighborhood.at n=31A270158
• Number of permutations of [n] that avoid the shuffle pattern s-k-t, where s = 12 and t = 12.at n=8A324133
• a(n) is the number of smallest parts in the overpartitions of n having odd smallest part.at n=19A335730