444444888889
domain: N
Appears in sequences
- Squares of primes having digits in nondecreasing order.at n=21A028866
- Smallest square starting with a string of n 4's.at n=5A034985
- Squares composed of digits {4,8,9}.at n=11A053967
- a(n) consists of n 4's, n-1 8's and a single 9 (in that order).at n=5A109344
- Numbers n where n is a prime to the (nonzero) power of a prime, and each digit of n is also a prime to the (nonzero) power of a prime.at n=5A217700
- Squares that remain squares if you decrease them by 3 times a repunit with the same number of digits.at n=25A273230
- Squares formed by concatenating k and 2*k+1.at n=14A309828