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A061043
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Numerator of 1/25 - 1/n^2.
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13
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0, 11, 24, 39, 56, 3, 96, 119, 144, 171, 8, 231, 264, 299, 336, 3, 416, 459, 504, 551, 24, 651, 704, 759, 816, 7, 936, 999, 1064, 1131, 48, 1271, 1344, 1419, 1496, 63, 1656, 1739, 1824, 1911, 16, 2091, 2184, 2279, 2376, 99, 2576, 2679, 2784
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OFFSET
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5,2
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COMMENTS
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From Pfund spectrum of hydrogen. Wavelengths in hydrogen spectrum are given by Rydberg's formula 1/wavelength = constant*(1/m^2 - 1/n^2).
a(n)=(n+5)^2-25=n*(n+10) except a(5p) p pos. Second (with m=5) of this kind after AO61039,Paschen (m=3) and before A061047,Hansen-Strong (m=7). For the fourth,what is the value of m in 1/m^2-1/n^2 ? m=9? [From Paul Curtz, Nov 01 2008]
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REFERENCES
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J. E. Brady and G. E. Humiston, General Chemistry, 3rd. ed., Wiley; p. 78.
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LINKS
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Table of n, a(n) for n=5..53.
J. J. O'Connor and E. F. Robertson, Johannes Robert Rydberg
Eric Weisstein's World of Physics, Balmer Formula
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MATHEMATICA
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Numerator[1/25-1/Range[5, 60]^2] (* Harvey P. Dale, Jan 28 2013 *)
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CROSSREFS
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Cf. A061035-A061050.
Sequence in context: A213991 A213062 A157756 * A098603 A053061 A055820
Adjacent sequences: A061040 A061041 A061042 * A061044 A061045 A061046
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KEYWORD
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nonn,frac,nice
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AUTHOR
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N. J. A. Sloane, May 26 2001
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STATUS
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approved
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