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%I #15 Apr 03 2023 10:36:12
%S 1,1,9,7,0,4,4,9
%N Decimal expansion of sum of reciprocals of cousin primes.
%C The value is obtained by summing cousin prime pairs with values less than 2^42 (which yields 1.10633...) and a logarithmic extrapolation of Brun's constant A065421.
%C The estimate by [Park-Lee] is 1.197054+-7e-6. - _R. J. Mathar_, Feb 09 2013
%D Yeonyong Park, Heonsoo Lee, On the several differences between primes, J. Appl. Math. & Computing 13 (2003) vol 1-2, pp 37-51.
%H Prime Curios!, <a href="https://t5k.org/curios/page.php/1.1970449.html">Sum of reciprocals of cousin primes</a>
%H Marek Wolf, <a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.22.1864">On the Twin and Cousin Primes</a>, (1996) IFTUWr 909/96
%H Marek Wolf, <a href="http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.55.8070">Generalized Brun's constants</a>, (1997) IFTUWr 910/97
%H Eric E. Weisstein, <a href="http://mathworld.wolfram.com/CousinPrimes.html">MathWorld: Cousin primes</a>
%F Equals 1.1970449... = (1/7+1/11)+(1/13+1/17)+.. = sum_{n>=2) (1/A023200(n) +1/A046132(n)).
%K nonn,cons,more
%O 1,3
%A _Kausthub Gudipati_, Aug 15 2011
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