3968064

Appears in sequences

• Lesser of a primitive pair such that n and its 10's complement are simultaneously square.at n=4A068075
• Numbers n such that n and its 10's complement are both squares, i.e., n and 10^k - n (where k is the number of digits in n) are squares.at n=23A068810
• a(n) is the (2^n)-th powerful number.at n=12A382790