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A101272
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a(n)=n, n <=6; a(n)=6, n > 6.
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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; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Sequence of electron arrangements in the 2p 3p 4p and 5p atomic subshells.
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REFERENCES
| 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
| 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
| a(6)=6
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PROG
| (PARI) a(n)=max(0, min(6, n)) /* Michael Somos Aug 31 2006 */
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CROSSREFS
| Cf. A040000.
Sequence in context: A063283 A036055 A034151 * A006160 A071640 A102674
Adjacent sequences: A101269 A101270 A101271 * A101273 A101274 A101275
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KEYWORD
| easy,nonn
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AUTHOR
| Jeremy Gardiner (jeremy.gardiner(AT)btinternet.com), Dec 19 2004
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