48670

Appears in sequences

• Number of primitive n-bead necklaces (turning over is allowed) where complements are equivalent.at n=22A000046
• a(n) is twice the coefficient of 1 in the fundamental unit of Q(sqrt(A000037(n))) where A000037 lists the nonsquare numbers (Version 1).at n=39A048941
• Number of primitive (period n) bracelet structures using exactly two different colored beads.at n=21A056366
• Largest integer terms forming a self-convolution 4th root of a sequence (A132837) such that: A132837(n) <= 4*A132837(n-1) for n>0 with A132837(0)=1.at n=10A132838
• Half the number of length n integer sequences with sum zero and sum of squares 8450.at n=3A157597
• Coefficient a(n) of three-term recurrence relation for solutions of the equation in integers x^2-n*floor(x/sqrt(n))^2=1 such that x(i+2)=a(n)*x(i+1)-x(i). n is a nonsquare number.at n=39A180495
• a(n) = A273059(4n).at n=39A275916
• a(n) is the even term in the linear recurrence signature for numerators and denominators of continued fraction convergents to sqrt(n), or 0 if n is a square.at n=46A341862
• a(n) is twice the coefficient of 1 in the fundamental unit of Q(sqrt(A000037(n))) where A000037 lists the nonsquare numbers (Version 2).at n=39A346419
• For each row n in array A374602(n, k), the asymptotic geometric growth factor of every A377290(n) terms, represented by its nearest integer.at n=39A377291