223729

Appears in sequences

• (Terms in A014738)/4.at n=20A051515
• Smallest square that contains the digits of n in its exact middle.at n=37A062689
• Squares of the form 4*A014574(n-1) + 1.at n=31A131706
• a(n) is the least perfect square average of two consecutive primes with 2*n gap between them, or -1 if no such number exists.at n=17A360751