30924

Appears in sequences

• Least of four consecutive numbers which are cubefree and not squarefree, i.e., numbers k such that {k, k+1, k+2, k+3} are in A067259.at n=15A071320
• Starts for strings of at least five consecutive nonsquarefree numbers.at n=20A078144
• Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 0110-0110-1111 pattern in any orientation.at n=11A147359
• Array T(n,m) = A177944(2*n,2*m) read by antidiagonals.at n=38A177970
• Array T(n,m) = A177944(2*n,2*m) read by antidiagonals.at n=42A177970
• Number of 2 X 2 matrices having all terms in {1,...,n} and determinant in the closed interval [0,n].at n=25A211057
• Numbers k such that Bernoulli number B_{k} has denominator 1919190.at n=19A295595