Two interleaved sequences: odd positions (1,3,5,7) are squares of even numbers (2², 4², 6², 8² = 4, 16, 36, 64). Even positions (2,4,6) are squares of decreasing even numbers (14², 12², 10² = 196, 144, 100). The next term in position 8 continues the even-position sequence with 8²=64.