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A210032 a(n)=n for n=1,2,3 and 4; a(n)=5 for n>=5. 0

%I

%S 1,2,3,4,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,

%T 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,

%U 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5

%N a(n)=n for n=1,2,3 and 4; a(n)=5 for n>=5.

%C In atomic spectroscopy, a(n) is the number of D term symbols with spin multiplicity equal to n, i.e., there is one singlet-D term (n=1), and there are two doublet-D terms (n=2), three triple-D terms (n=3), four quartet-D terms (n=4) and five terms for every other D term of multiplicity 5 or higher (n>=5).

%C Decimal expansion of 11111/9000. [_Arkadiusz Wesolowski_, Mar 29 2012]

%F a(n) = min(n,5). - _Wesley Ivan Hurt_, Apr 16 2014

%t Join[Range@4, Table[5, {83}]] (* _Arkadiusz Wesolowski_, Mar 29 2012 *)

%t PadRight[{1,2,3,4},120,{5}] (* _Harvey P. Dale_, Sep 23 2017 *)

%K easy,nonn

%O 1,2

%A _A. Timothy Royappa_, Mar 16 2012

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Last modified May 8 15:38 EDT 2021. Contains 343666 sequences. (Running on oeis4.)