2214144

Appears in sequences

• Numbers n such that n / product of digits of n is a square.at n=33A001104
• Squares composed of digits {1,2,4}.at n=7A053881
• Squares which are divisible by the product of their digits.at n=12A118548
• 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=30A208138
• T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.at n=37A221245
• Number of 2 X n arrays of occupancy after each element moves to some horizontal, diagonal or antidiagonal neighbor.at n=7A221246
• Squares whose digits are powers of 2.at n=24A272884
• Perfect powers k (exponent greater than 1) such that k-1 and k+1 are both semiprime.at n=21A276564
• Perfect powers whose digits are all powers of the same single-digit base.at n=29A385351