A014761 Squares of numbers in array formed from odd elements to the right of middle of rows of Pascal triangle.

1, 1, 9, 1, 1, 25, 1, 225, 1, 1225, 441, 49, 1, 1, 81, 1, 2025, 1, 27225, 3025, 121, 1, 245025, 1, 1656369, 511225, 169, 1, 9018009, 1002001, 8281, 1, 41409225, 25050025, 9018009, 1863225, 207025, 11025, 225, 1, 1, 289, 1, 23409, 1, 938961