168921

Appears in sequences

• a(n) = (11*n + 4)^2.at n=37A017438
• a(n) = (12*n + 3)^2.at n=34A017558
• RF(3): refactorable numbers with smallest prime factor 3.at n=38A120319
• Squares that become a prime number when prefixed with a 2.at n=18A167717
• Squares that become a prime number when prefixed with a 5.at n=10A167720
• Squares that become prime numbers when prefixed with an 8.at n=16A167723
• Powerful numbers (A001694) which can be written as the sum of two relatively prime 3-powerful numbers (A036966) different from 1.at n=14A210470
• Squares that are the sum of the digits of the numbers from 0 to n, for some n.at n=40A271629
• Square numbers of the form prime(k) + 2*prime(k+1).at n=14A284057
• Squares that are the concatenation of a square and a nonzero cube.at n=3A389643