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Search: id:A101272
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| A101272 |
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a(n)=n, n <=6; a(n)=6, n > 6. |
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+0
1
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| 1, 2, 3, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Sequence of electron arrangements in the 2p 3p 4p and 5p atomic subshells.
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REFERENCES
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A. Beiser, Concepts of Modern Physics, 2nd Ed., McGraw-Hill, 1973.
R. M. Tennent (Editor), Science Data Book, Oliver & Boyd, 1971.
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FORMULA
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a(n)=n, n <=6; a(n)=6, n > 6.
Euler transform of length 6 sequence [ 2, 0, 0, 0, 0, -1]. - Michael Somos Aug 31 2006
G.f.: (1-x^6)/(1-x)^2. - Michael Somos Aug 31 2006
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EXAMPLE
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a(6)=6
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PROGRAM
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(PARI) a(n)=max(0, min(6, n)) /* Michael Somos Aug 31 2006 */
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CROSSREFS
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Cf. A040000.
Sequence in context: A063283 A036055 A034151 this_sequence A006160 A071640 A102674
Adjacent sequences: A101269 A101270 A101271 this_sequence A101273 A101274 A101275
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KEYWORD
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easy,nonn
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AUTHOR
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Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Dec 19 2004
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