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HP Forums / HP Calculators (and very old HP Computers) / General Forum v / Fibonacci numbers without programming

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Fibonacci numbers without programming
09-20-2017, 03:13 PM
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stored Offline
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Fibonacci numbers without programming
Amazingly, most of simple non-scientific calculators allow to produce sequence of Fibonacci numbers with only 2 key press per number:

AC 1 + = + = + = ...

On HP 17b I found solutions with 6 keys per number:
For init: 0 ENTER 1 ENTER
Next number: SHIFT LAST + SHIFT LAST =

How to do this on RPN calculators like HP 12C, HP 42S (without programming)?
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