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A200678 Partial sums of A200675. 1

%I #20 Jul 25 2021 02:24:53

%S 1,2,3,4,6,8,10,12,16,20,24,28,36,44,52,60,76,92,108,124,156,188,220,

%T 252,316,380,444,508,636,764,892,1020,1276,1532,1788,2044,2556,3068,

%U 3580,4092,5116,6140,7164,8188,10236,12284,14332,16380,20476,24572,28668,32764

%N Partial sums of A200675.

%C Partial sums of powers of 2 repeated 4 times.

%C The first few terms of this sequence appear in the reference by Szymczak, et al., as contour levels in intensity maps of maser emissions.

%H M. Szymczak, R. J. Cohen and A. M. S. Richards, <a href="http://adsabs.harvard.edu/full/1998MNRAS.297.1151S">Full polarization structure of the OH main-line maser envelopes of W Hydrae</a>, Monthly Notices of the Royal Astronomical Society, Volume 297, Issue 4, pp. 1151-1162.

%H <a href="/index/Rec#order_05">Index entries for linear recurrences with constant coefficients</a>, signature (1,0,0,2,-2).

%F G.f.: x*(1+x)*(1+x^2) / ( (x-1)*(2*x^4-1) ). - _R. J. Mathar_, Nov 21 2011

%e a(5) = 1+1+1+1+2 = 6.

%o (BASIC) for i=0 to 12 : for j=1 to 4 : s=s+2^i : print s : next j : next i

%Y Cf. A027383, A200672, A200675.

%K nonn

%O 1,2

%A _Jeremy Gardiner_, Nov 20 2011

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