210681
domain: N
Appears in sequences
- a(n) = (12*n + 3)^2.at n=38A017558
- a(1) = 1; a(n) is the smallest square > a(n-1) which differs from it at every digit.at n=37A068854
- Smallest number beginning with n and having exactly n divisors.at n=20A077350
- Numbers with 21 divisors.at n=22A137484
- Squares that become prime numbers when prefixed with an 8.at n=19A167723
- Numbers with prime factorization p^2*q^6.at n=22A189990
- Number of n X 4 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 1 0 vertically.at n=19A207399
- Number of n X 4 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=16A208138
- Square numbers of the form prime(k) + 2*prime(k+1).at n=15A284057
- Squares whose arithmetic mean of digits is 3 (i.e., the sum of digits is 3 times the number of digits).at n=19A316483
- Powers k^m, m > 1, odd k that are neither squarefree nor squareful.at n=29A392423