1121481

Appears in sequences

• a(n) = x^2 = A090116(n)^2 is the least square that is "surrounded" by two closest primes, by prevprime(x^2) and nextprime(x^2) whose difference nextprime - prevprime = 2n.at n=27A090117
• Squares whose digits are powers of 2.at n=20A272884
• 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=27A360751
• Perfect powers whose digits are all powers of the same single-digit base.at n=25A385351