58104

Appears in sequences

• Number of ordered quadruples of integers from [ 1,n ] with no common factors between triples.at n=37A015635
• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 39 ones.at n=14A031807
• Smallest n-aspiring number. That is, a(n) = smallest k such that s^(n)(k) is perfect but s^(n-1)(k) is not, where s(k) is the sum of the aliquot parts of k and s^(i) means iterate s i times.at n=27A099771
• Number of length 4+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=18A248541
• Numbers that are the sum of 10 consecutive primes and also the sum of 10 consecutive semiprimes.at n=12A284102
• a(n) = (1/4) * Sum_{k=0..floor(n/2)} (k+2) * 2^(n-2*k) * binomial(2*k+2,2*n-4*k+1).at n=15A391836