47959

Appears in sequences

• Sums of 4 distinct powers of 6.at n=19A038480
• n-th 4k+1 prime times n-th 4k-1 prime.at n=23A048630
• Composite numbers n such that the sum of divisors of n, sigma(n), divided by the number of divisors, d(n) and sigma(n) minus n are both rational squares.at n=10A049226
• a(n) = 4*n^4 + 8*n^3 - 4*n - 1 = (2*n^2 - 1)*(2*n^2 + 4*n + 1).at n=10A057769
• Smallest squarefree integer k such that Q(sqrt(k)) has class number n.at n=41A081363
• Numbers k such that phi(k)*sigma(k) is a cube.at n=18A114077
• Numbers n such that sum of divisors, sigma(n), and sum of the proper divisors, sigma(n)-n, are both square.at n=9A176996
• Nonprime terms in A210494.at n=20A230214
• Number of partitions p of 2n such that n - (number of parts of p) is a part of p.at n=25A238607
• Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers.at n=46A247137
• Number of unlabeled uniform connected hypergraphs of weight n.at n=21A302129
• Lagged Fibonacci Generator: a(n) = (100003 - 200003*n + 300007*n^3) mod 10^6 for n <= 55, a(n) = (a(n-24) + a(n-55)) mod 10^6.at n=18A380292