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Search: id:A117463
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| A117463 |
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Final number reached in the associated iterations of A117462. This is the first doubled iteration to equal or exceed N. |
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+0
6
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| 2, 4, 6, 8, 10, 12, 14, 16, 18, 16, 16, 12, 16, 20, 24, 28, 32, 18, 20, 32, 24, 32, 40, 24, 28, 32, 36, 40, 44, 48, 32
(list; graph; listen)
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OFFSET
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0,1
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FORMULA
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Compute SOD(N), double, count number of doubled iterations to equal or exceed N.
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EXAMPLE
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In a(10) = 16, N = 11. SOD(11) = 2. 2 doubled is 4,8,16, or 3 iterations in A117462.
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PROGRAM
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UBASIC 10 'use of str, mid, len, val 20 'number of doubled iterations required to equal or exceed sod(n) 30 C=C+1 40 D=str(C) 50 E=len(D) 60 for Q=2 to E 70 A=mid(D, Q, 1):G=val(A) 80 I=I+G 90 next Q 100 print C; I; "-"; 110 K=I 120 I=0 130 for R=1 to C 140 K=K+K:T=T+1 150 if K>=C then print C; K; T:cancel for:stop:goto 170 160 next R 170 K=0:T=0 180 goto 30
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CROSSREFS
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Cf. A117462.
Sequence in context: A113603 A056964 A052008 this_sequence A095371 A055960 A007928
Adjacent sequences: A117460 A117461 A117462 this_sequence A117464 A117465 A117466
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KEYWORD
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easy,nonn,base
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Mar 18 2006
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