52441

Appears in sequences

• a(n) = (6*n + 1)^2.at n=38A016922
• a(n) = (7*n + 5)^2.at n=32A017042
• a(n) = (8*n + 5)^2.at n=28A017126
• a(n) = (9*n + 4)^2.at n=25A017210
• a(n) = (10*n + 9)^2.at n=22A017378
• a(n) = (11*n + 9)^2.at n=20A017498
• a(n) = (12*n + 1)^2.at n=19A017534
• Strong pseudoprimes to base 44.at n=32A020270
• Numbers that are both lucky and square.at n=37A031162
• Square numbers that are concatenations of two or more prime numbers.at n=34A038692
• Squares with initial digit '5'.at n=14A045788
• Squares of primes lacking the digit zero in their decimal expansion.at n=38A052043
• Numbers k such that sigma_4(k)/sigma_2(k) is prime.at n=14A066109
• Square of primes of the form 4k+1 (A002144).at n=21A080109
• Least square k^2 > n^2 whose decimal expansion ends in n^2.at n=21A090292
• Draw a line through every pair of points with coordinates (x, 1) and (x', 2) with x, x' in 1..n, and then count the number of intersection points above the line y = 2.at n=29A092275
• Squares of the form prime(k)*prime(k+1) + 2*prime(k+1).at n=15A108604
• Hypotenuses of primitive Pythagorean triples which are not prime numbers and which are the hypotenuse of a unique triangle.at n=30A146945
• Composite numbers with primitive root 10.at n=25A158248
• Squares that become a prime number when prefixed with a 1.at n=35A167716