28828

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 92 ones.at n=27A031860
• Numbers k for which the digital sum of k contains the same distinct digits as k itself.at n=37A249515
• Hankel transform of a(n) is A006720(n). Hankel transform of a(n+1) is A006720(n+2).at n=10A254314
• Number of nX3 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.at n=5A283629
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.at n=33A283634
• Number of 6Xn 0..1 arrays with no 1 equal to more than one of its horizontal, diagonal and antidiagonal neighbors, with the exception of exactly two elements.at n=2A283639
• Numbers with digits 2 and 8 only.at n=43A284922