81848

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 11.at n=32A031689
• D'Agapeyeff cipher.at n=26A135209
• a(n) = 121*n^2 + 2*n.at n=25A181679
• Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.at n=5A260919
• Number of (n+2)X(6+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00010101 00101011 or 01010101.at n=5A260925
• Numbers k such that (10^k + 77)/3 is prime.at n=29A281303