41839

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 43 ones.at n=3A031811
• 30 'Reverse and Add' steps are needed to reach a palindrome.at n=18A065319
• G.f. satisfies: A(x) = x^2 + Series_Reversion(x - x*A(x)).at n=7A212923
• Number of 2Xn 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of the elements above it or zero plus the sum of the elements diagonally to its northwest, modulo 4.at n=10A240413
• Number of nX3 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=7A302665
• T(n,k)=Number of nXk 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=52A302670
• Minimal conductors c of cyclic cubic number fields K with elementary bicyclic 3-class group Cl_3(K)=(3,3) and second 3-class group M=Gal(F_3^2(K)/K) of assigned coclass cc(M)=0,1,2,3,...at n=3A380103