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): $153$