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A269780
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Table read by antidiagonals where T(i,j) is the location of the pair (i,j) in A269501.
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3
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1, 2, 4, 5, 3, 9, 10, 8, 7, 16, 17, 15, 6, 14, 25, 26, 24, 13, 12, 23, 36, 37, 35, 22, 11, 21, 34, 49, 50, 48, 33, 20, 19, 32, 47, 64, 65, 63, 46, 31, 18, 30, 45, 62, 81, 82, 80, 61, 44, 29, 28, 43, 60, 79, 100, 101, 99, 78, 59, 42, 27, 41, 58, 77, 98, 121, 122, 120, 97, 76, 57, 40, 39, 56, 75, 96, 119, 144
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OFFSET
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1,2
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COMMENTS
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This is trivially a permutation of the positive integers.
The "location" of the pair is taken to be the index of the second element of the pair.
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LINKS
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FORMULA
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T(i,j) :=
if i=1, then (j-1)^2 + 1,
if i>j, then i^2 - 2j + 2,
and otherwise j^2 - 2i + 3.
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EXAMPLE
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The table starts:
1, 2, 5, 10, 17, 26
4, 3, 8, 15, 24, 35
9, 7, 6, 13, 22, 33
16, 14, 12, 11, 20, 31
25, 23, 21, 19, 18, 29
36, 34, 32, 30, 28, 27
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CROSSREFS
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If 1 is subtracted from each term we get A316323.
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KEYWORD
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AUTHOR
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STATUS
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approved
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