Search: id:A156850
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%I A156850
%S A156850 2,5,11,17,29,41,47,59,79,97,127,139,157,173,191,211,223,233,251,263,
%T A156850 277,307,331,347,367,389,419,439,457,479,503,521,541,557,577,599,631,
%U A156850 643,659,683,701,719,739,761,787,811,823,839,863,881,907,929,953,971
%N A156850 a(1)=2, a(n+1) is the smallest prime > a(n) + sum of digits of a(n).
%e A156850 2, 5(>4=2+2), 11(>10=5+5), 17(>13=11+1+1), 29(>25=17+1+7), etc.
%p A156850 A007953 := proc(n) add(d,d=convert(n,base,10)) ; end: A156850 := proc(n) 
               option remember; if n = 1 then 2; else procname(n-1)+A007953(procname(n-1)) 
               ; nextprime(%) ; fi; end: seq(A156850(n),n=1..120) ; [From R. J. 
               Mathar (mathar(AT)strw.leidenuniv.nl), Feb 20 2009]
%Y A156850 Cf. A000040, A156672.
%Y A156850 Sequence in context: A023222 A007491 A124850 this_sequence A156611 A143509 
               A111166
%Y A156850 Adjacent sequences: A156847 A156848 A156849 this_sequence A156851 A156852 
               A156853
%K A156850 nonn
%O A156850 1,1
%A A156850 Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Feb 17 2009

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