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A120073
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Denominator triangle for hydrogen spectrum rationals.
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10
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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; refs; listen; history; internal format)
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OFFSET
| 2,1
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COMMENTS
| The corresponding numerator triangle is A120072.
See A120072 and A120070 for more details.
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LINKS
| W. Lang: First ten rows, rationals and more.
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FORMULA
| 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
| Row sums give A120075.
Cf. A126252.
Sequence in context: A182723 A176607 A134815 * A056894 A117676 A085575
Adjacent sequences: A120070 A120071 A120072 * A120074 A120075 A120076
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KEYWORD
| nonn,easy,tabl,frac
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Jul 20 2006
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