%I A061047
%S A061047 0,15,32,51,72,95,120,3,176,207,240,275,312,351,8,435,480,527,576,
%T A061047 627,680,15,792,851,912,975,1040,1107,24,1247,1320,1395,1472,1551,
%U A061047 1632,5,1800,1887,1976,2067,2160,2255,48,2451,2552,2655,2760,2867
%N A061047 Numerator of 1/49 - 1/n^2.
%C A061047 a(n)=(n+7)^2-49=n*(n+14), except a(7p). Named Hansen-Strong. Comes after 
               Lyman(1906-1914), Balmer(1885), Paschen(1908), Brackett(1922), Pfund(1924), 
               Humphreys(1952 not 1953, justified later). [From Paul Curtz (bpcrtz(AT)free.fr), 
               Oct 07 2008]
%D A061047 Peter Hansen and John Strong, Seventh Series of Atomic Hydrogen, Applied 
               Optics, vol 12, 2, (feb 1973), pp.429-430. [From Paul Curtz (bpcrtz(AT)free.fr), 
               Oct 07 2008]
%Y A061047 Cf. A061035-A061050.
%Y A061047 Cf. A061039, A061043, A045944.
%Y A061047 Sequence in context: A041448 A157767 A146889 this_sequence A098848 A055809 
               A007256
%Y A061047 Adjacent sequences: A061044 A061045 A061046 this_sequence A061048 A061049 
               A061050
%K A061047 nonn,frac
%O A061047 7,2
%A A061047 N. J. A. Sloane (njas(AT)research.att.com), May 26 2001