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A061040
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Denominator of 1/9 - 1/n^2.
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11
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1, 144, 225, 12, 441, 576, 81, 900, 1089, 48, 1521, 1764, 75, 2304, 2601, 324, 3249, 3600, 147, 4356, 4761, 64, 5625, 6084, 729, 7056, 7569, 100, 8649, 9216, 363, 10404, 11025, 1296, 12321, 12996, 507, 14400, 15129, 588, 16641, 17424
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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REFERENCES
| Friedrich Paschen, Zur Kenntis ultraroter Linienspktren, Annalen der Physik 27, pp. 537-570 (1908). [From Paul Curtz (bpcrtz(AT)free.fr), Dec 04 2008]
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LINKS
| Reinhard Zumkeller, Table of n, a(n) for n = 3..1000
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MATHEMATICA
| Denominator[1/9-1/Range[3, 50]^2] (* From Harvey P. Dale, Jan 16 2012 *)
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PROG
| (Haskell)
import Data.Ratio ((%), denominator)
a061040 n = denominator $ 1%9 - 1%n^2 -- Reinhard Zumkeller, Jan 03 2012
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CROSSREFS
| See A061039 for comments, references, links.
Sequence in context: A135780 A069701 A124144 * A159456 A064563 A008436
Adjacent sequences: A061037 A061038 A061039 * A061041 A061042 A061043
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KEYWORD
| nonn,frac,nice
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 26 2001
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