50879

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 45 ones.at n=5A031813
• Counterbalanced numbers: Composite numbers k such that phi(k)/(sigma(k)-k) is an integer.at n=35A055940
• Triangle read by rows: T(n,k) = number of permutations p of [n] such that max(|p(i)-i|)=k (n>=1, 0<=k<=n-1).at n=41A130152
• Numbers such that the digital sums in bases 2, 3, 5 and 7 all are equal.at n=36A135127
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2), where a(0) = 1, a(1) = 3, b(0) = 2, b(1) = 4.at n=18A294414
• Number of permutations p of [n] such that max_{j=1..n} |p(j)-j| = 5.at n=4A323801
• Numbers k such that there is a smaller number m > 1 such that k*m equals the concatenation of digit-wise multiplication, keeping the leading digits of k when m has fewer digits.at n=45A392568