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Hofstadter Figure-Figure sequences: Difference between revisions
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Over a third of the program was for verification of the first thousand numbers in the Hofstadter Figure-Figure sequences.
This REXX version is over '''15,000%''' faster than REXX version 2.
<lang rexx>/*REXX program calculates and verifies the Hofstadter Figure─Figure sequences. */
parse arg x top bot . /*obtain optional arguments from the CL*/
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