2026-02-01 16:33:20 -08:00
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# Generate Van Eck sequence.
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F ← (
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◡<⊙⊙◌⊃(⋅⧻|⊸˜⨂)°⊂. # Check where/if first digit already appeared.
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⊂⨬(⋅⋅0|⋅+₁) # If new, prepend zero, else last index it was in.
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)
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⇌⍥F999 [0] # Generate 1000 terms and reverse.
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⊃(&p↙¯)(&p↙∘)10 # Print first and last 10 terms.
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