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A341315
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Triangle read by rows: T(n,k) = (n+k)/gcd(n,k), n>=0, 0<=k<=n.
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2
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0, 1, 2, 1, 3, 2, 1, 4, 5, 2, 1, 5, 3, 7, 2, 1, 6, 7, 8, 9, 2, 1, 7, 4, 3, 5, 11, 2, 1, 8, 9, 10, 11, 12, 13, 2, 1, 9, 5, 11, 3, 13, 7, 15, 2, 1, 10, 11, 4, 13, 14, 5, 16, 17, 2, 1, 11, 6, 13, 7, 3, 8, 17, 9, 19, 2, 1, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 2, 1, 13, 7, 5, 4, 17, 3, 19, 5, 7, 11, 23, 2
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OFFSET
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0,3
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COMMENTS
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We define gcd(0,0) = 0.
This is half of the array A341314. See that entry for further information.
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LINKS
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EXAMPLE
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Triangle begins:
[0]
[1, 2]
[1, 3, 2]
[1, 4, 5, 2]
[1, 5, 3, 7, 2]
[1, 6, 7, 8, 9, 2]
[1, 7, 4, 3, 5, 11, 2]
[1, 8, 9, 10, 11, 12, 13, 2]
[1, 9, 5, 11, 3, 13, 7, 15, 2]
[1, 10, 11, 4, 13, 14, 5, 16, 17, 2]
[1, 11, 6, 13, 7, 3, 8, 17, 9, 19, 2]
[1, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 2]
...
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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