%I #22 Jun 03 2019 02:03:23

%S 9,1,1,2,6,7,0,5,0,5,8

%N Inverse of the Rydberg constant in meters.

%C In angstroms this constant is Yr = 911.2670....

%C The wavelengths are Yr*(0, 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, ... = k^2).

%C The first differences Yr*(1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, ...).

%C The second differences Yr*(2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, ...).

%C Yr2= 2 * Yr = 0.000000182253410110... m.

%C k=1 is Lyman, k=2 is Balmer, ..., k=7 is Hansen-Strong.

%C In 1885, R was sure with 4 digits (A126252). For indigo, 9*243729/2 = 109678... .

%H NIST, <a href="https://physics.nist.gov/cgi-bin/cuu/Value?ryd">Rydberg constant</a>

%F 1/(R=10973731.56851...) m.

%e 0.00000009112670505509(46) m.

%Y Cf. A081821, A145646, A145647, A000290, A005408, A007395.

%K nonn,cons

%O -7,1

%A _Paul Curtz_, May 10 2013

%E Updated by _Ivan Panchenko_, May 31 2019