51529

Appears in sequences

• a(n) = (6*n + 5)^2.at n=37A016970
• a(n) = (8n + 3)^2.at n=28A017102
• a(n) = (9*n + 2)^2.at n=25A017186
• a(n) = (10*n + 7)^2.at n=22A017354
• a(n) = (11*n + 7)^2.at n=20A017474
• a(n) = (12*n + 11)^2.at n=18A017654
• Squares with initial digit '5'.at n=12A045788
• Numbers that are not squarefree and whose Euler totient function is squarefree.at n=38A049198
• Squares of primes lacking the digit zero in their decimal expansion.at n=37A052043
• Numbers k such that sigma(k)*phi(k) is squarefree.at n=22A065299
• Composite numbers k such that the sum of the divisors of k^2 is a prime.at n=25A065405
• Smallest composite k such that phi(k) > k*(1-1/n^2).at n=14A069639
• Least square s such that A078142(s) is equal to the n-th prime.at n=9A076830
• Squares of primes of the form 4*k+3.at n=26A087691
• Least square k^2 > n^2 whose decimal expansion ends in n^2.at n=23A090292
• Smith square numbers.at n=9A098839
• Numbers m such that Sum_{p prime|m} p^r(p) = m, where r(p) is the least positive primitive root of p (A001918).at n=29A101051
• Squares of lesser of twin primes.at n=15A108570
• Squares of the form 2*p + 3, where p is a prime.at n=36A109367
• Squares of the form 2*p+3 that are squares of primes.at n=23A110588