101664

Appears in sequences

• a(n) = Product_{i=1..n} sigma(i) * Sum_{i=1..n} 1/sigma(i).at n=6A067577
• a(n) is the least number of sides of a regular circumscribed k-gon whose perimeter yields Pi to within 1/10^n.at n=9A259442
• Number of (n+2)X(5+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111.at n=8A260367
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x + 47^2)^2 = y^2.at n=12A332000
• Number of permutations avoiding 132 of length 3n composed of only 3-cycles.at n=8A350645