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Search: id:A074164
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| A074164 |
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Smallest k such that R(k) > n*k, where R(k) is the digit reversal of k (A004086) (the reversal of 10 is taken to be 01 = 1, etc.). |
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+0
3
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OFFSET
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1,1
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COMMENT
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As R(k) doesn't increase the number of digits, R(k)<10k and so the sequence is complete. - Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 15 2003
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EXAMPLE
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a(3) = 15, 51 > 3*15, a(3) is not 14 as 41 < 42 = 3*14. a(12) = 430 > 12*34.
a(4) = 17 as 71 > 17*4 but 61 is < 16*4.
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MAPLE
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P := proc(Nlo, Nhi, Klo, Khi) local A::list, k, n, d, s; d := (X::posint)->convert(X, base, 10):s := (L::list)->sum(L[i]*10^(nops(L)-i), i=1..nops(L)):k := Klo:A := [seq(0, i=1..Nhi-Nlo+1)]: for n from Nlo to Nhi do while k<Khi and s(d(k))<=n*k do k := k+1 od: A[n-Nlo+1] := k; od: return A; end proc; - Francois Jooste (phukraut(AT)hotmail.com), Oct 23 2002
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CROSSREFS
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Cf. A074163.
Sequence in context: A085556 A127354 A125664 this_sequence A076085 A039790 A102496
Adjacent sequences: A074161 A074162 A074163 this_sequence A074165 A074166 A074167
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KEYWORD
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base,nonn,fini,full
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 30 2002
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EXTENSIONS
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Edited by Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Jan 15 2003
Edited by N. J. A. Sloane (njas(AT)research.att.com) at the suggestion of Andrew Plewe, May 21 2007
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