66942

Appears in sequences

• a(n) = [ a(n-1)/a(1) + a(n-2)/a(2) + ... + a(1)/a(n-1) ], for n >= 3.at n=34A022869
• Cube root of A061096(n).at n=35A067177
• Numbers k such that k concatenated with k-6 gives the product of two numbers which differ by 5.at n=13A116118
• Numbers k such that k concatenated with k-2 gives the product of two numbers which differ by 3.at n=9A116143
• Numbers k such that k concatenated with itself gives the product of two numbers which differ by 1.at n=5A116154
• Numbers k such that there are 10 digits in k^2 and for each factor f of 10 (1, 2, 5) the sum of digit groupings of size f is a square.at n=32A153748
• Number of (n+2)X(1+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 5 6 or 8 and every 3X3 column and antidiagonal sum not equal to 0 3 5 6 or 8.at n=9A252608
• a(n) is the largest nonnegative integer m such that m - pi(m) >= pi(m)^(1 + 1/n).at n=3A334599