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A138099
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Base for (8 X 32) Janet periodic table of elements. Ordered energy levels of atoms. 20 terms.
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0
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1, 2, 2, 3, 3, 4, 3, 4, 5, 4, 5, 6, 4, 5, 6, 7, 5, 6, 7, 8
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n) = 1+n-floor((1/4)*(floor(sqrt(4*n+1))-1)^2). [Mircea Merca, Feb 05 2012]
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EXAMPLE
| 1 (1 term for row 1), 2 (1 term for row 2), 2, 3 (2 terms for row 3), 3, 4 (2 terms for row 4), 3, 4, 5 (3 terms for row 5) 4, 5, 6 (3 terms for row 6), 4, 5, 6, 7 (4 terms for row 7), 5, 6, 7, 8 (4 terms for row 8).
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CROSSREFS
| Sequence in context: A087504 A067539 A166312 * A110266 A205561 A127431
Adjacent sequences: A138096 A138097 A138098 * A138100 A138101 A138102
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KEYWORD
| nonn,uned,changed
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AUTHOR
| Paul Curtz (bpcrtz(AT)free.fr), May 03 2008
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