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A097287
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Rectangular array T by antidiagonals: T(n,k) = rank of n where (n,k) occurs in A097285, for distinct n,k and T(n,n)=0 for all n.
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1
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0, 1, 2, 3, 0, 6, 7, 5, 4, 12, 13, 9, 0, 8, 20, 21, 15, 11, 10, 14, 30, 31, 23, 17, 0, 16, 22, 42, 43, 33, 25, 19, 18, 24, 32, 56, 57, 45, 35, 27, 0, 26, 34, 44, 72, 73, 59, 47, 37, 29, 28, 36, 46, 58, 90, 91, 75, 61, 49, 39, 0, 38, 48, 60, 74, 110, 111, 93, 77, 63, 51, 41, 40, 50, 62
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| Every odd number occurs exactly once above the diagonal and every even, exactly once below the diagonal.
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EXAMPLE
| Northwest corner:
0 1 3 7 13
2 0 5 9 15
6 4 0 11 17
12 8 10 0 19
T(1,4)=7 because in A097285 the unique occurrence of 1,4 is
in positions 7,8.
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CROSSREFS
| Sequence in context: A173717 A058301 A199601 * A089134 A084257 A185963
Adjacent sequences: A097284 A097285 A097286 * A097288 A097289 A097290
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KEYWORD
| nonn,tabl
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu), Aug 05 2004
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