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A092543
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Table below read by antidiagonals alternately upwards and downwards.
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2
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1, 2, 1, 1, 2, 3, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 13, 12, 11, 10, 9, 8
(list; table; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| 1 2 3 4 5 ...
1 2 3 4 5 ...
1 2 3 4 5 ...
1 2 3 4 5 ...
...
Let A be sequence A092543 (this sequence) and B be sequence A092542 (1, 1, 2, 3, 2, 1, 1, ...). Under upper trimming or lower trimming, A transforms into B and B transforms into A. Also, B gives the number of times each element of A appears. For example, A(4) = 1 and B(4) = 3 because the 1 in A(4) is the third 1 to appear in A. - Kerry Mitchell (lkmitch(AT)gmail.com), Dec 28 2005
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REFERENCES
| Amir D. Aczel, "The Mystery of the Aleph, Mathematics, the Kabbalah and the Search for Infinity", Barnes & Noble, NY 2000, page 112.
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FORMULA
| T(r,c)=c.
A092542(n)+A092543(n)=1+A002024(n) [From Enrique Perez Herrero (psychgeometry(AT)gmail.com), Apr 01 2010]
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MATHEMATICA
| Table[ Join[Range[2n], Reverse@Range[2n - 1]], {n, 7}] // Flatten (* Robert G. Wilson v Sep 28 2006 *)
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CROSSREFS
| Cf. A092542.
Sequence in context: A174807 A181572 A054482 * A090282 A022910 A030737
Adjacent sequences: A092540 A092541 A092542 * A092544 A092545 A092546
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KEYWORD
| easy,nonn,tabl
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AUTHOR
| Sam Alexander (amnalexander(AT)yahoo.com), Feb 27 2004
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