99863

Appears in sequences

• Composite k such that (k+1) * Sum_{d|k} d/sigma(d) is an integer.at n=22A068975
• Number of 3Xn 0..1 arrays with all rows having a nonnegative second derivative, and all and columns having a positive second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative.at n=11A223653
• Number of (n+3) X 5 0..1 matrices with each 4 X 4 subblock idempotent.at n=21A224562