69451

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 99 ones.at n=2A031867
• Indices of records in A159918.at n=23A230097
• a(n) = smallest m such that wt(m^2) = n (where wt(i) = A000120(i)), or -1 if no such m exists.at n=26A231897
• Number of length 2+3 0..n arrays with every four consecutive terms having the sum of some three elements equal to three times the fourth.at n=29A248539
• Least number x such that x^n has n digits equal to k. Case k = 2.at n=28A285449
• Numbers having in binary representation more zeros than their squares.at n=7A293655
• a(n) is the least k such that k^2 has a maximal Hamming weight A357658(n) in the range 2^n <= k^2 < 2^(n+1).at n=30A357659
• a(n) is the least k such that B(k^2) - B(k) = n, where B(m) is the binary weight A000120(m).at n=17A357750