Van Eck sequence: Difference between revisions
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=={{header|ABC}}==
<syntaxhighlight lang="ABC">HOW TO RETURN vaneck.sequence length:
PUT {[1]: 0} IN seq
WHILE #seq < length:
PUT #seq-1 IN i
WHILE i>0 AND seq[i]<>seq[#seq]: PUT i-1 IN i
SELECT:
i=0: PUT 0 IN seq[#seq+1]
ELSE: PUT #seq-i IN seq[#seq+1]
RETURN seq
PUT vaneck.sequence 1000 IN eck
FOR i IN {1..10}: WRITE eck[i]>>4
WRITE /
FOR i IN {991..1000}: WRITE eck[i]>>4
WRITE /</syntaxhighlight>
{{out}}
<pre> 0 0 1 0 2 0 2 2 1 6
4 7 30 25 67 225 488 0 10 136</pre>
=={{header|Action!}}==
<syntaxhighlight lang="action!">INT FUNC LastPos(INT ARRAY a INT count,value)
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