Search: id:A109512
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%I A109512
%S A109512 0,1,3,6,9,13,17,22,27,32,38,44,50,57,64,71,78,86,94,102,110,119,128,
%T A109512 137,146,156,166,176,186,196,207,218,229,240,251,263,275,287,299,311,
%U A109512 324,337,350,363,376,389,403,417,431,445,459,473,488,503,518,533,548
%N A109512 Integers which are not the sum of n and A001462(n).
%C A109512 Terms computed by Robert G. Wilson.
%e A109512 Let N=succession of the natural numbers, G=Golomb self-describing sequence, 
               S=sum of n and according G(n):
%e A109512 N=1.2.3.4.5..6..7..8..9.10.11.12.13.14.15.16.17.18.19.20.21.22
%e A109512 G=1,2,2,3,3,.4,.4,.4,.5,.5,.5,.6,.6,.6,.6,.7,.7,.7,.7,.8,.8,.8
%e A109512 S=2.4.5.7.8.10.11.12.14.15.16.18.19.20.21.23.24.25.26.28.29.30
%e A109512 Integers not in S (0,1,3,6,9,13,17,22...) form the sequence.
%p A109512 a[1] = 1; a[n_] := a[n] = 1 + a[n - a[a[n - 1]]]; Do[ a[n], {n, 10^5}]; 
               h = Complement[ Range[100000 + a[10^5]], Table[n + a[n], {n, 10000}]] 
               t = Table[n + Sum[PrimePi[k], {k, 1, n}], {n, 0, 1200}]
%Y A109512 Sequence in context: A123753 A124288 A002815 this_sequence A025205 A024190 
               A004116
%Y A109512 Adjacent sequences: A109509 A109510 A109511 this_sequence A109513 A109514 
               A109515
%K A109512 base,easy,nonn
%O A109512 0,3
%A A109512 Eric Angelini, Alexandre Wajnberg and Robert G. Wilson (eric.angelini(AT)kntv.be), 
               Aug 29 2005

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