9360540

Appears in sequences

• Expansion of 1/(1-4*x)^(17/2).at n=6A020928
• Amicable quadruples: the numbers b referred to in A036471.at n=19A036472
• Number of nonnegative integer 4 X 4 matrices with sum of elements equal to n, up to rotational symmetry.at n=13A054773
• Let v = list of denominators of Farey series of order n (see A006843); let b(n) = Sum 1/(k*k'*(k+k')), where (k,k') are pairs of successive terms of v; a(n) = denominator of b(n).at n=11A278048
• Let v = list of denominators of Farey series of order n (see A006843); let b(n) = Sum k*k'/(k+k'), where (k,k') are pairs of successive terms of v; a(n) = denominator of b(n).at n=11A278561