24730

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 34.at n=4A031622
• a(n) = Sum_{k=0..n} (-1)^(k+1) * k * A000041(n-k).at n=46A270143
• Number of nX4 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.at n=13A298959
• The number of 3-permutations that avoid the patterns 132 and 213.at n=13A356728