1102500

Appears in sequences

• Numbers k such that k is a square and remains a square when its leading digit is increased by one.at n=7A067225
• Squares n with digit 1 that remain positive square after omitting all 1's from n.at n=18A176899
• Number of 7Xn 0..1 arrays avoiding 0 0 1 and 0 1 1 horizontally and 0 0 1 and 1 0 1 vertically.at n=7A208146
• Perfect powers k (exponent greater than 1) such that k-1 and k+1 are both semiprime.at n=17A276564
• a(n) = sigma_2(n)^2.at n=27A356533
• Perfect powers in A329150.at n=33A361821
• Perfect powers k^m, m > 1, omega(k) > 1, such that A053669(k) > A006530(k) that are not also products of primorials, where omega = A001221.at n=21A380452
• Powers k^m, m > 1, where k is neither squarefree nor squareful, and has a primorial kernel but is not a product of primorials.at n=18A389682