Readouts

sallows readouts puzzle

A puzzle by Lee Sallows. In this readout from a computer-driven electronic display, the digits in the fifth row have been obscured. What are they?

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They’re the same as the numbers in the first row. Added colors make it easier to see that each number in row n counts how many segments of each type (color) occur in row n – 1. Remarkably, the loop closes after four cycles. (Thanks, Lee.)