740520

Appears in sequences

• Determinant of the n X n matrix whose element (i,j) equals t(|i-j|) where t(n) is the number of divisors of n and t(0) = 0.at n=12A071084
• Number of ordered rooted trees with n non-root nodes and all outdegrees <= eight.at n=13A291823
• Integers k such that there are i groups of order k+i up to isomorphism, for i=1,2,3,4.at n=14A373650