51947

Appears in sequences

• Numerators of continued fraction convergents to sqrt(511).at n=8A041976
• a(n) is the smallest nonprime k such that tau(k + n) = tau(k) + n , where tau(n) is the number of divisors of n (A000005).at n=36A099642
• Numbers 41*k such that 41*k+2 and 41*k-6 are both prime.at n=15A153822
• Number of 7 X 7 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.at n=28A156392
• a(n) is the smallest number k such that tau(k + n) = tau(k) + n where tau(n) is the number of divisors of n (A000005).at n=37A305196
• Record values in A356640.at n=20A356642