Start with the counting numbers:
1, 2, 3, 4, 5, 6, 7�
Take out the even numbers & add the numbers cumulatively
1, (1 + 3), (4 + 5), (9 + 7), (16 + 9)�
Get the sequence of consecutive squares:
1, 4, 9, 16!
Alfred Moessner discovered these magic numbers in the 1950's.
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