48380

Appears in sequences

• Divide even numbers into groups with prime(n) elements and add together.at n=16A034959
• a(n) is the smallest number m such that phi(m)+sigma(m)=n*pi(m).at n=22A145747
• a(n) = 121*n^2 - n.at n=19A157960
• a(n) = 484*n^2 - 2*n.at n=9A158329
• a(n) = 400*n^2 - 20.at n=10A158597
• Number of -n..n arrays x(0..3) of 4 elements with nonzero sum and with zero through 3 differences all nonzero.at n=7A200167
• Number of integers in the interval [2, A289663(n)] whose greatest prime factor is equal to the n-th popular prime A385503(n).at n=13A289665
• a(n) is the number of 5 element sets of distinct integer-sided trapezoids each of area less than 3*n^2 whose base angles are 60 degrees that fill a regular hexagon of side n units.at n=41A390763