Cubic Recurring Digital Invariant/Examples/136

Example of Cubic Recurring Digital Invariant

$136$ is a cubic recurring digital invariant:

\(\ds 136: \ \ \) \(\ds 1^3 + 3^3 + 6^3\) \(=\) \(\ds 1 + 27 + 216\) \(\ds = 244\)
\(\ds 244: \ \ \) \(\ds 2^3 + 4^3 + 4^3\) \(=\) \(\ds 8 + 64 + 64\) \(\ds = 136\)

$\blacksquare$


Sources

  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $136$
  • 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $153$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $136$
  • 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $153$
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