Digit Sum Sequence Calculator

Iterate digit sums

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About Digit Sum Sequence Calculator

A digit sum sequence calculator computing the iterated digit sum chain: sum digits of n, then sum digits of result, until single digit (digital root). Shows each step, the digital root formula dr(n)=1+(n−1)mod 9, and digit sum statistics. Client-side.

Digit Sum Sequence Calculator Features

  • Digit sum chain
  • Digital root
  • Step count
  • Formula shortcut
  • Statistics
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