12152196

Appears in sequences

• Squares of even hexagonal numbers.at n=20A014772
• Squares composed of three overlapping subsquares, which overlap by one digit.at n=4A048425
• Triangle read by rows: first row is 2; given row k, define the elements of row k+1 as the (sorted) elements derived from row k by two recursion rules: (i.) if x is in row k, then (x+5)^2 is in row k+1; (ii.) if x^2 is in row k, then x is in row k+1.at n=17A296142