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 A176768 Smallest power of 8 whose decimal expansion contains n. 2
 4096, 1, 512, 32768, 64, 512, 64, 32768, 8, 4096, 1073741824, 4398046511104, 512, 134217728, 262144, 2097152, 16777216, 134217728, 1073741824, 68719476736, 2097152, 262144, 2251799813685248, 9223372036854775808, 1073741824 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,1 COMMENTS This is to 8 as A176763 is to 3 and as A030001 is to 2. LINKS Robert Israel, Table of n, a(n) for n = 0..9999 FORMULA a(n) = MIN{A001018(i) such that n in decimal representation is a substring of A001018(i)}. a(n) = 8^A062525(n). - Michel Marcus, Sep 30 2014 EXAMPLE a(1) = 1 because 8^0 = 1 has "1" as a substring (not a proper substring, though). a(2) = 512 because 8^3 = 512 has "2" as a substring. a(3) = 32768 because 8^5 = 32768 has "3" as a substring. MAPLE F:= proc(dmax) local R, count, x, N, L, d, i, v; count:= 0: x:= 1/8: N:= 10^dmax: while count < N do   x:= 8*x;   L:= convert(x, base, 10);   for d from 1 to min(dmax, nops(L)) do     for i from 1 to nops(L)-d+1 do       v:= add(L[j]*10^(j-i), j=i..i+d-1);       if not assigned(R[v]) then count:= count+1; R[v]:= x fi od od od: seq(R[v], v=0..N-1); end proc: F(2); # Robert Israel, Dec 25 2019 CROSSREFS Cf. A001018, A030001, A176763, A176764-A176773. Sequence in context: A076154 A182685 A182686 * A223601 A186490 A223694 Adjacent sequences:  A176765 A176766 A176767 * A176769 A176770 A176771 KEYWORD base,easy,nonn AUTHOR Jonathan Vos Post, Apr 25 2010 EXTENSIONS More terms from Sean A. Irvine and Jon E. Schoenfield, May 05 2010 a(0)=4096 inserted by Robert Israel, Dec 25 2019 STATUS approved

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Last modified September 22 20:23 EDT 2020. Contains 337291 sequences. (Running on oeis4.)