95220

Appears in sequences

• Numbers k such that the sets of prime factors (ignoring multiplicity) of A000203(k) = sigma(k) and of A001157(k) = sigma_2(k) are identical.at n=10A081380
• Molecular topological indices of the complete bipartite graphs K_{n,n}.at n=22A192418
• Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=6A207366
• Number of 7Xn 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=5A207372
• Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=7A303011
• Numbers that are both exponential and nonexponential abundant numbers.at n=33A348627