15523600domain: NAppears in sequencesSquares of even heptagonal numbers.at n=20A014792Number of nX4 binary arrays without the pattern 1 1 0 diagonally or antidiagonally.at n=6A189106Number of 7Xn binary arrays without the pattern 1 1 0 diagonally or antidiagonally.at n=3A189115a(n) is the (2^n)-th powerful number.at n=13A382790