36181

Appears in sequences

• Pseudo-bricks with n nodes.at n=5A006292
• Numbers k such that the continued fraction for sqrt(k) has period 85.at n=32A020424
• 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 42.at n=3A031630
• Scale factor by which primitive Pythagorean triangle {x=A088509(n), y=A088510(n), z=A088511(n)} needs be enlarged in order to circumscribe the smallest integral square having a side on the hypotenuse.at n=21A088544
• Numbers n such that sigma_3(n) is divisible by square of cototient of n, while n is not a prime number.at n=19A091286
• Odd numbers producing 4 odd numbers in the Collatz iteration.at n=33A198587
• Odd numbers producing 20 even numbers in the Collatz iteration.at n=42A199818
• Numbers k such that k!6 - 48 is prime, where k!6 is the sextuple factorial number (A085158).at n=29A289701
• Array A read by upward antidiagonals in which the entry A(n,k) in row n and column k is defined by A(n, k) = 4^n*(6*k - 3 - 2*(-1)^n) + (4^n - 1)/3, n,k >= 1.at n=50A371100