99857

Appears in sequences

• a(1) = 1, a(n) is the smallest integer > a(n-1) such that the largest element in the simple continued fraction for S(n) = 1/a(1) + 1/a(2) + ... + 1/a(n) equals n^4.at n=6A070904
• a(n) = smallest k such that the digit sum of 7k is n.at n=48A077494
• a(n)=(-1)^n(1 - (1/12)n(n + 1)(12 - n + n^2)).at n=33A080275
• Number of (n+2)X3 binary arrays avoiding patterns 000 and 011 in rows, columns and nw-to-se diagonals.at n=11A202770
• Numbers of the form n^2 + 1 without prime divisors of the form a^2 + 1.at n=31A217279
• Number of Lyndon words appearing as n-th degree terms in Baker-Campbell-Hausdorff series.at n=20A220587
• Number of Lyndon words appearing as n-th degree terms in Baker-Campbell-Hausdorff series.at n=21A220587