150024

Appears in sequences

• McKay-Thompson series of class 24I for Monster.at n=39A058579
• McKay-Thompson series of class 24I for the Monster group with a(0) = 2.at n=39A138688
• Numbers other than prime powers divisible by the sum of the squares of their prime divisors.at n=15A190882
• Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x) defined below in Comments.at n=22A192760
• a(n) = gcd(Sum_{k=1...n} L(k), Product_{j=1...n} L(j)), where L(k) is the k-th Lucas number.at n=31A239799
• Integers k such that there exists an integer 0<m<k such that (1/sigma(m)^2 + 1/sigma(k)^2)*(m+k)^2 = 1.at n=32A383964