624100

Appears in sequences

• Powerful(1) numbers (A001694) whose digit reversal is a pentagonal number (A000326).at n=20A115695
• Squares equal to the difference between two successive primes of the form n^2+1.at n=32A216330
• Triangle read by rows: first row is 2; given row k, define the elements of row k+1 to be the (sorted) elements derived from row k by two recursion rules: (i.) if x is in row k, then (x+3)^2 is in row k+1; (ii.) if x^2 is in row k, then x is in row k+1.at n=16A321350