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Search: id:A120073
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| A120073 |
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Denominator triangle for hydrogen spectrum rationals. |
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+0
9
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| 4, 9, 36, 16, 16, 144, 25, 100, 225, 400, 36, 9, 12, 144, 900, 49, 196, 441, 784, 1225, 1764, 64, 64, 576, 64, 1600, 576, 3136, 81, 324, 81, 1296, 2025, 324, 3969, 5184, 100, 25, 900, 400, 100, 225, 4900, 1600
(list; table; graph; listen)
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OFFSET
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2,1
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COMMENT
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The corresponding numerator triangle is A120072.
See A120072 and A120070 for more details.
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LINKS
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W. Lang: First ten rows, rationals and more.
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FORMULA
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a(m,n)=denominator(r(m,n)) with r(m,n):=1/n^2 - 1/m^2, m>=2, n=1..m-1.
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CROSSREFS
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Row sums give A120075.
Cf. A126252.
Sequence in context: A006392 A084449 A134815 this_sequence A056894 A117676 A085575
Adjacent sequences: A120070 A120071 A120072 this_sequence A120074 A120075 A120076
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KEYWORD
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nonn,easy,tabl,frac
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AUTHOR
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Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Jul 20 2006
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