5668704

Appears in sequences

• a(n) = 3^n*n^(n-1).at n=5A038061
• a(n) = 2^A066657(n) * 3^A066658(n).at n=19A076941
• Numbers n such that (phi(n) + sigma(n))/(rad(n))^2 is an integer > 1 (phi=A000010, sigma=A000203, rad=A007947).at n=24A097982
• Numbers k such that (phi(k) + sigma(k))/rad(k)^2 is an integer, that is (phi(k) + sigma(k)) is divisible by every prime factor of k squared.at n=26A121850
• a(n) = 3*a(n-1) if n is odd, otherwise 6*a(n-1).at n=11A130505
• Number of (n+1)X4 0..2 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order.at n=5A203979
• Number of (n+1)X7 0..2 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order.at n=2A203982
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order.at n=30A203984
• T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having equal diagonal elements or equal antidiagonal elements, and new values 0..2 introduced in row major order.at n=33A203984
• a(n) = a(floor(n/2))*a(ceiling(n/2)), where a(0) = 1, a(1) = 2, a(2) = 3.at n=27A298413
• a(n) = Product_{i=1..n, j=1..n, k=1..n} (i^2 + j^2 + k^2).at n=2A324425