%I A061044
%S A061044 1,900,1225,1600,2025,100,3025,3600,4225,4900,225,6400,7225,8100,
%T A061044 9025,80,11025,12100,13225,14400,625,16900,18225,19600,21025,180,
%U A061044 24025,25600,27225,28900,1225,32400,34225,36100,38025,1600,42025
%N A061044 Denominator of 1/25 - 1/n^2.
%C A061044 After Balmer(1885), m = 2, Lyman(1906), m = 1, Paschen(1908), m = 3, 
               Brackett(1922), m = 4. Before Humphreys(1952), m = 6, Hansen-Strong(1973), 
               m = 7. From Rydberg-Ritz formula (1888). Possible very special m 
               = 0 in A152977 . [From Paul Curtz (bpcrtz(AT)free.fr), Dec 28 2008]
%D A061044 A. H. Pfund, The emission of nitrogen and hydrogen in the infrared, Journal 
               of the 0ptical Society of America Vol 9,Issue 3, (1924) pp.193-196.
%Y A061044 See A061041 for comments, references, links.
%Y A061044 Sequence in context: A145498 A158408 A158409 this_sequence A127658 A137490 
               A129575
%Y A061044 Adjacent sequences: A061041 A061042 A061043 this_sequence A061045 A061046 
               A061047
%K A061044 nonn,frac,nice
%O A061044 5,2
%A A061044 N. J. A. Sloane (njas(AT)research.att.com), May 26 2001